The urgency and importance of the Marshall Space Flight Center's mission in the 1960s was apparent from the begirning. It became even more apparent on April 12, 1962, when the Soviet cosmonaut, Yuri Gagarin, became the first man in space.

S75-32343 (15 July 1975) --- The two Soviet crewmen for the Apollo-Soyuz Test Project mission are photographed at the launch pad at the Baikonur Cosmodrome in Kazakhstan on the morning of the Soviet ASTP liftoff on July 15, 1975. They are cosmonauts Aleksey A. Leonov (left), commander; and Valeriy N. Kubasov, flight engineer. Leonov is waving to well-wishers at the launch pad. The Soviet ASTP launch preceded the American ASTP Apollo liftoff by seven and one-half hours. The American and Soviet spacecraft were docked in Earth orbit for a total of about 47 hours on July 17-19, 1975. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

KENNEDY SPACE CENTER, FLA. -- Soviet Cosmonaut tour of KSC. United States, Soviet Union, prime crews for Apollo Soyuz Test Project inspect spacecraft checkout facilities in Manned Spacecraft Operations Building ACE Station. From left are astronauts Donald K. Slayton, Vance D. Brand and Thomas P. Stafford; cosmonauts Valeriy Kubasov and Aleksey Leonov.

S75-21599 (12 Feb. 1975) --- Six Apollo-Soyuz Test Project crewmen participate in joint crew training in Building 35 at the Johnson Space Center. They are (wearing flight suits), left to right, astronaut Thomas P. Stafford, commander of the American ASTP prime crew; astronaut Donald K. Slayton, docking module pilot on Stafford?s crew; cosmonaut Valeriy N. Kubasov, engineer on the Soviet ASTP first (prime) crew; astronaut Vance D. Brand, command module pilot on Stafford?s crew; cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP first (prime) crew; and cosmonaut Vladimir A. Dzhanibekov, commander of the Soviet ASTP third (backup) crew. Brand is seated next to the hatch of the Apollo Command Module trainer. This picture was taken during a ?walk-through? of the first day?s activities in Earth orbit. The other men are interpreters and training personnel.

S74-25259 (June 1974) --- Four crewmen of the joint U.S.-USSR Apollo-Soyuz Test Project mission are photographed beside a Soyuz spacecraft trainer during ASTP crew training activity at the Cosmonaut Training Center (Star City) near Moscow. They are, left to right, astronaut Donald K. Slayton, docking module pilot of the American ASTP prime crew; cosmonaut Valeriy N. Kubasov, engineer of the Soviet ASTP first (prime) crew; cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP first (prime) crew; and astronaut Thomas P. Stafford, commander of the American ASTP prime crew.

S74-28666 (14 Sept. 1974) --- Cosmonaut Aleksey A. Leonov, in one of the lighter moments of activity involving Soviet cosmonauts and American astronauts, joins a belly dancer on stage as several visitors to weekend activity at the site of San Antonio?s HemisFair look on. Leonov is commander of the Soviet Apollo-Soyuz Test Project (ASTP) crew. A group of cosmonauts is in this country training with American astronauts for the joint U.S.-USSR ASTP rendezvous and docking mission scheduled for the summer of 1975. The Lebanese dancing was just one feature among many during the Texas Folklife Festival, in which members of 26 ethnic groups participated.

S75-25615 (April 1975) --- The Soviet Soyuz spacecraft for the Apollo-Soyuz Test Project mission is seen during prelaunch preparations at the Baikonur launch complex near Tyuratam in the Kazakh Soviet Socialist Republic. American ASTP crewmen visited the site while in the Soviet Union for training at the Cosmonaut Training Center (Star City) near Moscow. The Baikonur launch facility is located some 2,100 kilometers (1,300 miles) southeast of Moscow. The three major components of the Soyuz spacecraft are the Orbital Module (top), Descent Vehicle (in middle) and the Instrument Assemble Module (at bottom with solar panels). PHOTO COURTESY: USSR ACADEMY OF SCIENCES

S75-28483 (15 July 1975) --- An overall view of the Mission Operations Control Room in the Mission Control Center on the first day of the Apollo-Soyuz Test Project docking mission in Earth orbit. The American ASTP flight controllers at NASA's Johnson Space Center were monitoring the progress of the Soviet ASTP launch when this photograph was taken. The television monitor shows cosmonaut Yuri V. Romanenko at his spacecraft communicator?s console in the ASTP mission control center in the Soviet Union. The American ASTP liftoff followed the Soviet ASTP launch by seven and one-half hours.

AST-03-171 (17 July 1975) --- The hands of cosmonaut Valerly N. Kubasov are seen as the ASTP engineer adds his name to the signature on the Soviet side of the official joint certificate marking an historical moment during the rendezvous day of the Apollo-Soyuz Test Project. The left hand of astronaut Donald K. Slayton, NASA's docking module pilot, is seen at left. The certificate had earlier been signed by astronauts Thomas P. Stafford, American crew commander; Slayton and cosmonaut Aleksey A. Leonov, Soviet crew commander, and it awaits the signature of astronaut Vance D. Brand, NASA's command module pilot who remained in the CM while the others signed in the Soviet Orbital Module of the Soyuz.

S74-29892 (7 Sept. 1974) --- President Gerald R. Ford removes the Soviet Soyuz spacecraft model from a model set depicting the 1975 Apollo-Soyuz Test Project, an Earth orbital docking and rendezvous mission involving crewmen from the U.S. and USSR, who visited Mr. Ford at the White House. The cosmonauts and astronauts are, left to right, Vladimir A. Shatalov, Chief, Cosmonaut Training; Valeriy N. Kubasov, ASTP Soviet engineer; Aleksey A. Leonov, ASTP Soviet crew commander; Thomas P. Stafford, ASTP American crew commander; Donald K. Slayton, American crew?s docking module pilot; and Vance D. Brand, command module pilot for the U.S. team. Dr. George M. Low, Deputy Administrator, National Aeronautics and Space Administration, is partially obscured behind Mr. Ford.

S74-28649 (16 Sept. 1974) --- Three crewmen of the Apollo-Soyuz Test Project are seated in a Soviet Soyuz spacecraft orbital module mock-up in Building 35 during ASTP simulation training at the Johnson Space Center. They are cosmonaut Anatoliy V. Filipchenko (left background), commander of the Soviet ASTP second (backup) crew; cosmonaut Nikolay N. Rukavishnikov (left foreground), engineer on the crew; and astronaut Vance D. Brand (right), command module pilot of the American ASTP prime crew. The hatch in the background leads to the Docking Module. During the exercise the American ASTP crew and the Soviet ASTP crew simulated docking the Apollo and Soyuz in Earth orbit and transferring to each other?s spacecraft. Here, Brand is visiting the Soyuz spacecraft. The crewmen are training in both the U.S. and the USSR for the joint mission scheduled for the summer of 1975.

S75-22770 (25 Feb. 1975) --- Two American ASTP prime crewmen have a meal with the Soviet ASTP first (prime) crewmen during Apollo-Soyuz Test Project joint crew training at NASA's Johnson Space Center. The four are inside the Soyuz orbital module mock-up in Building 35. They are, left to right, astronaut Donald K. Slayton, docking module pilot of the American crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; astronaut Thomas P. Stafford, commander of the American crew; and cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew. The training session simulated activities on the second day in Earth orbit. During the actual mission the other American crewmen, astronaut Vance D. Brand, command module pilot, would be in the Command Module.

S75-25941 (April 1975) --- An Apollo-Soyuz Test Project (ASTP) symbolic painting by artist Bert Winthrop of Rockwell International Space Division, Downey, California. The artwork is composed of the ASTP mission insignia, the docked Apollo-Soyuz spacecraft, and portraits of the five ASTP prime crewmen, all superimposed against Earth's sphere in the center of the picture. The launches of both the American ASTP space vehicle (on left) and the Soviet ASTP space vehicle are depicted in the lower right corner. The five crewmen are, clockwise from the ASTP emblem, astronaut Thomas P. Stafford, commander of the American crew; astronaut Donald K. Slayton, docking module pilot of the American crew; astronaut Vance D. Brand, command module pilot of the American crew; cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew; and cosmonaut Aleksey A. Leonov, commander of the Soviet crew. The joint U.S.-USSR ASTP docking mission in Earth orbit is scheduled for July 1975.

S74-20797 (23 April 1974) --- Candidate food items being considered for the joint U.S.-USSR Apollo-Soyuz Test Project mission are sampled by three ASTP crewmen in Building 4 at the Johnson Space Center. They are, left to right, cosmonaut Valeriy N. Kubasov, engineer on the Soviet ASTP crew; astronaut Vance D. Brand, command module pilot of the American ASTP crew; and cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP crew. Kubasov is marking a food rating chart on which the crewmen mark their choices, likes and dislikes of the food being sampled. Brand is drinking orange juice from an accordion-like dispenser. Leonov is eating butter cookies. The two Soviet crewmen will have an opportunity to eat with the three American crewmen while the Apollo and Soyuz spacecraft are docked in Earth orbit. Leonov and Kubasov will dine on food being chosen individually by them now.

CAPE CANAVERAL, Fla. – KSC Director Lee Scherer, left, escorts a Soviet interpreter and Vladimir Shatalov, Soviet Cosmonaut Training Chief, on a tour of Pad 39B at the Spaceport. The Soviet and American personnel connected with July's Apollo Soyuz Test Project were at KSC February 8-10 to inspect equipment and tour facilities. The first international crewed spaceflight was a joint U.S.-U.S.S.R. rendezvous and docking mission. The Apollo-Soyuz Test Project, or ASTP, took its name from the spacecraft employed: the American Apollo and the Soviet Soyuz. The three-man Apollo crew lifted off from Kennedy Space Center aboard a Saturn IB rocket on July 15, 1975, to link up with the Soyuz that had launched a few hours earlier. A cylindrical docking module served as an airlock between the two spacecraft for transfer of the crew members. Photo credit: NASA

S75-24899 (April 1975) --- An exhibit illustrating the space suits designed for the Soviet cosmonaut crewmen of the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. These were on display in the training building at the Cosmonaut Training Center (Star City) near Moscow.

AST-03-189 (17-19 July 1975) --- Cosmonaut Valeriy N. Kubasov, left, Soviet ASTP engineer; and astronaut Thomas P. Stafford, Apollo crew commander, are seen during a visit by the two crewmen to the Soviet Soyuz Orbital Module during the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. The visit was one of four made among the five crewmen on July 17-18-19, 1975. A 35mm camera was used to make this picture.

S75-25619 (25 April 1975) --- A group of American ASTP crewmen is briefed on the operation of the consoles in the main control room at the ASTP flight control center at the Cosmonaut Training Center (Star City) near Moscow. The astronauts were in the Soviet Union for ASTP joint crew training with the Soviet ASTP crewmen. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

S74-24948 (4 July 1974) --- A group of astronauts from the Apollo-Soyuz Test Project office at the Johnson Space Center are photographed with their Soviet hosts after attending a reception at the USSR Academy of Sciences in Moscow. They are standing on the front steps of the scientific institution. The Americans were in the Soviet Union to take part in ASTP familiarization training at the Cosmonaut Training Center near Moscow. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

S74-28811 (23 Sept. 1974) --- The five prime crewmen of the joint U.S.-USSR Apollo-Soyuz Test Project mission are photographed in the Flight Crew Training Facility, Building 35, at the Johnson Space Center during ASTP crew training activity. They are, left to right, astronaut Donald K. Slayton, docking module pilot of the American crew; cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; astronaut Thomas P. Stafford, commander of the American crew; and astronaut Vance D. Brand, command module pilot of the American crew.

S75-22410 (March 1975) --- These five men compose the two prime crews of the joint United States-USSR Apollo-Soyuz Test Project (ASTP) docking mission in Earth orbit scheduled for July 1975. They are astronaut Thomas P. Stafford (standing on left), commander of the American crew; cosmonaut Aleksey A. Leonov (standing on right), commander of the Soviet crew; astronaut Donald K. Slayton (seated on left), docking module pilot of the American crew; astronaut Vance D. Brand (seated center), command module pilot of the American crew; and cosmonaut Valeriy N. Kubasov (seated on right), engineer on the Soviet crew.

S75-24052 (8-10 Feb. 1975) --- A space-suited Mickey Mouse character welcomes the prime crewmen of the Apollo-Soyuz Test Project mission to Florida?s Disney World near Orlando. The crewmen made a side-trip to Disney World during a three-day inspection tour of NASA's Kennedy Space Center. The crewmen were at KSC to look over launch facilities and flight hardware. Receiving the jovial Disney World welcome are, left to right, cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew; astronaut Donald K. Slayton, docking module pilot of the American crew; astronaut Vance D. Brand, command module pilot of the American crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; astronaut Thomas P. Stafford, commander of the American crew; and cosmonaut Vladimir A. Shatalov, Chief of Cosmonaut Training for the USSR.

S75-24926 (April 1975) --- Cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP prime crew, practices with a training mock-up of the ASTP commemorative medal during Apollo-Soyuz Test Project activity at the Cosmonaut Training Center (Star City) near Moscow. Leonov is in the Soyuz orbital module trainer. Two medals divided into two halves each will be flown on the mission. The American ASTP crew will carry two halves aboard Apollo; and the Soviet ASTP crew will carry the other two halves aboard Soyuz. The four halves will be joined together to make two complete medals after the two spacecraft rendezvous and dock in Earth orbit. Grooved slots in the halves will allow the medals to be fitted together. One medal then will be returned to Earth by the astronauts; and the second medal will be brought back by the cosmonauts.

S75-33375 (15 July 1975) --- The Soviet Soyuz space vehicle, with cosmonauts Aleksey A. Leonov and Valeriy N. Kubasov aboard, is launched on the morning of July 15, 1975 from a pad at the Baikonur Cosmodrome in Kazahstan to begin the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. The Soyuz space vehicle is composed of the three-stage launch vehicle, the two-man, three-module Soyuz spacecraft and the launch escape system. The Soviet spacecraft (Soyuz 19) was launched seven and one-half hours before the American ASTP/Apollo-Saturn 1B liftoff from Kennedy Space Center (KSC), Florida. The American and Soviet spacecraft were joined together in space for approximately 47 hours on July 17-18-19, 1975. This picture was reproduced from a frame of 35mm film furnished by the USSR in an exchange of photography taken during the mission. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

At the Gagarin Cosmonaut Training Center in Star City, Russia, a wintry scene serves as a backdrop for a familiar sight – Lenin’s Statue --- commemorating Vladimir Lenin’s who led an evolving Soviet Union from 1917-1924. The photo was captured on Nov. 1, 2016. NASA/Stephanie Stoll

AST-05-301 (17-19 July 1975) --- Astronaut Donald K. Slayton, cosmonaut Aleksey A. Leonov and astronaut Thomas P. Stafford are photographed in the Soviet Soyuz during the Apollo-Soyuz Test Project docking mission in Earth orbit. This picture was taken with a 35mm camera.

AST-05-305 (17-19 July 1975) --- Cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew, is photographed in the Soyuz Orbital Module during the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. This picture was taken with a 35mm camera.

KENNEDY SPACE CENTER, FLA. -- The Apollo Soyuz Test Project Saturn IB launch vehicle thundered away from KSC's Launch Complex 39B at 3:50 p.m. today. Aboard the Apollo Command Module were ASTP astronauts Thomas Stafford, Vance Brand and Donald Slayton. The astronauts will rendezvous and dock with a Soyuz spacecraft, launched this morning from the Baykonur launch facility in the Soviet Union, carrying Soviet cosmonauts Aleksey Leonov and Valeriy Kubasov. The ASTP launches mark the first time that manned spacecraft of two nations have met in space for joint engineering and scientific investigations.

S75-22785 (25 Feb. 1975) --- An interior view of the Docking Module trainer, in Building 35, during Apollo-Soyuz Test Project (ASTP) joint crew training at NASA's Johnson Space Center (JSC). Astronaut Thomas P. Stafford, commander of the American ASTP prime crew, is on the right. The other crewman is cosmonaut Aleksky A. Leonov, commander of the Soviet ASTP prime crew. The training session simulated activities on the second day in Earth orbit. The American and Soviet crews will visit each other's spacecraft during the July 1975 docking mission in Earth orbit. The Docking Module is designed to link the Apollo and Soyuz spacecraft.

S74-20798 (23 April 1974) --- Candidate food items being considered for the joint U.S.-USSR Apollo-Soyuz Test Project mission are sampled by two ASTP crewmen in Building 4 at the Johnson Space Center. They are, left to right, astronaut Vance D. Brand, command module pilot of the American ASTP crew; and cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP crew. Leonov is drinking orange juice from an accordion-like dispenser. The two Soviet crewmen will have an opportunity to eat with the three American crewmen while the Apollo and Soyuz spacecraft are docked in Earth orbit. Leonov will dine on food being chosen by him now.

S75-24030 (8-10 Feb. 1975) --- The five prime crew members of the Apollo-Soyuz Test Project (ASTP) mission pose for a group photograph while at NASA's Kennedy Space Center (KSC) for a three-day inspection tour. They are, left to right, astronaut Donald K. (Deke) Slayton, docking module pilot of the American crew; astronaut Vance D. Brand, command module pilot of the American crew; astronaut Thomas P. Stafford, commander of the American crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; and cosmonaut Valeriy N. Kubasov, engineer of the Soviet crew. They were at KSC to look over launch facilities and flight hardware. They are standing in front of artist Robert McCall?s painting of an ASTP docking in Earth orbit.

S75-32340 (July 1975) --- Cosmonauts Valeriy N. Kubasov (left) and Aleksey A. Leonov participate in English language training during Apollo-Soyuz Test Project preflight preparations at the Cosmonaut Training Center (Star City) near Moscow. Leonov was the commander of the Soviet ASTP first (prime) crew; and Kubasov was the flight engineer on the same crew. They are seated in the language laboratory at Star City. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

S75-21715 (19 Feb. 1975) --- Cosmonaut Aleksey A. Leonov focuses his camera for an interior shot during a simulation exercise for the Apollo-Soyuz Test Project (ASTP). Leonov is inside the Soyuz orbital module mock-up in Building 35 at the Johnson Space Center (JSC), scene of current simulations for the joint U.S.-USSR space mission scheduled for July of this year. Astronauts and cosmonauts were taking part in second-day activity simulations when this photo was made. Leonov is the Soviet ASTP crew commander.

S75-20108 (September 1974) --- Cosmonaut Aleksey A. Leonov (right), commander of the first (prime) crew of Soviet cosmonauts on the planned Apollo-Soyuz Test Project (ASTP), enjoys a tribal welcome from Shoshone Indians during a hunting trip in the Lander, Wyoming area. Leonov was in the United States to take part in joint crew training at the Johnson Space Center.

S74-32481 (November 1974) --- These two men are flight directors for the joint U.S.-USSR Apollo-Soyuz Test Project mission scheduled for July 1975. Cosmonaut Aleksey A. Yeliseyev (left) is the Soviet ASTP senior flight director; M.P. Frank is the American ASTP senior flight director. They are seated beside a Docking Module training mock-up in Building 35 at the Johnson Space Center. Cosmonaut Yeliseyev was head of a delegation of USSR flight controllers who were at JSC for two weeks of ASTP training.

S74-17843 (March 1974) --- This is the official emblem of the Apollo-Soyuz Test Project chosen by NASA and the Soviet Academy of Sciences. The joint U.S.-USSR space mission is scheduled to be flown in July 1975. Of circular design, the emblem has the words Apollo in English and Soyuz in Russian around a center disc which depicts the two spacecraft docked together in Earth orbit. The Apollo-Soyuz Test Project will be carried out by a Soviet Soyuz spacecraft and a U.S. Apollo spacecraft which will rendezvous and dock in orbit. Soyuz and Apollo will remain docked for as long as two days in which period, the three Apollo astronauts will enter Soyuz and the two Soyuz cosmonauts will visit Apollo via a docking module. The Russian word "soyuz" means "union" in English.

S74-28972 (20 Sept. 1974) --- Astronaut Vance D. Brand (foreground) and cosmonaut Aleksandr S. Ivanchenko are seated in the Docking Module trainer in Building 35 during Apollo-Soyuz Test Project simulation training at the Johnson Space Center. Brand is the command module pilot of the American ASTP prime crew. Ivanchenko is the engineer on the Soviet ASTP fourth crew (backup). During the exercise the American ASTP crew and the Soviet ASTP crew simulated docking the Apollo and Soyuz in Earth orbit and transferring to each other?s spacecraft. The Docking Module is designed to link the Apollo and Soyuz spacecraft. The ASTP crewmen are training in both the U.S. and USSR for the joint mission scheduled for the summer of 1975. This view is looking from inside the Command Module into the Docking Module. The hatchway loading into the Soyuz spacecraft orbital module mock-up is in the background.

S75-25077 (May 1975) --- A photographic copy of a painting made by cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP first (prime) crew. This symbolic artwork, representing a Soviet Soyuz spacecraft docking in Earth orbit with an American Apollo spacecraft, was finished in May 1974. The sketch for the painting was made in 1973 following the signing of the space agreement between the United Stated and the Soviet Union. Leonov said that his painting symbolizes the new type of international cooperation of working together in space. The original painting, which measures 80 centimeters by 160 centimeters (1 cm. = 0.39 in.), is on display in a museum in the city of Baku on the Caspian Sea. In making the sketch for the painting Leonov used a model of an earlier Soyuz spacecraft and a picture of an Apollo spacecraft. Later, he obtained a model of an Apollo which helped him check the configuration of the American spacecraft. The tanks on the Docking Module are no longer exposed on the current DM configuration, he noted. Also, this would not be an exact view of the sun as seen from Earth orbit. Leonov took artist license in stressing the symbolism in his artwork. The Soyuz is represented smaller in the painting than it actually is, Leonov added.

CAPE CANAVERAL, Fla. – The Apollo Soyuz Test Project Saturn IB launch vehicle thundered away from KSC’s Launch Complex 39B at 3:50 p.m. today. Aboard the Apollo Command Module were ASTP Astronauts Thomas Stafford, Vance Brand and Donald Slayton. The astronauts will rendezvous and dock with a Soyuz spacecraft, launched this morning from the Baikonur launch facility in the Soviet Union, carrying Soviet cosmonauts Aleksey Leonov and Valeriy Kubasov. The first international crewed spaceflight was a joint U.S.-U.S.S.R. rendezvous and docking mission. The Apollo-Soyuz Test Project, or ASTP, took its name from the spacecraft employed: the American Apollo and the Soviet Soyuz. The three-man Apollo crew lifted off from Kennedy Space Center aboard a Saturn IB rocket on July 15, 1975, to link up with the Soyuz that had launched a few hours earlier. A cylindrical docking module served as an airlock between the two spacecraft for transfer of the crew members. Photo credit: NASA

AST-05-275 (17-19 July 1975) --- Cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP crew, displays a drawing of astronaut Thomas P. Stafford during the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. He is in the Soyuz Orbital Module. This picture was taken by an American ASTP crewman with a 35mm camera.

S75-21836 (20 Feb. 1975) --- Cosmonaut Anatoliy V. Filipchenko, commander of the Soviet ASTP second (backup) crew, participates in Apollo-Soyuz Test Project joint crew training in Building 35 at NASA's Johnson Space Center. Filipchenko is in the Apollo Command Module trainer. This picture was taken from inside the Docking Module during a ?walk-through? of the second day?s activities in Earth orbit.

S74-20807 (23 April 1974) --- Cosmonaut Aleksey A. Leonov (foreground) is briefed on the Apollo communications test system console in the Building 440 laboratory during the joint U.S.-USSR Apollo-Soyuz Test Project training activity at the Johnson Space Center. Leonov is the commander of the Soviet ASTP crew. Leonov is being briefed by astronaut Thomas P. Stafford, commander of the American ASTP crew.

JSC2000-E-27077 (16 October 2000) --- Expedition One crew members in Moscow's Red Square. From left, Soyuz pilot Yuri Gidzenko, flight engineer Sergei Krikalev, and expedition commander William M. (Bill) Shepherd. While in Moscow, the trio also visited the grave of Soviet cosmonaut Yuri Gagarin (1934-1968). Paying respects to the first man in space is customary in Russia prior to a spaceflight.

S75-22187 (25 Feb. 1975) --- Two ASTP crewmen look over food cans and packages in the Soyuz orbital module trainer in Building 35 during Apollo-Soyuz Test Project joint crew training at NASA's Johnson Space Center. They are astronaut Thomas P. Stafford (left), commander of the American ASTP prime crew; and cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP first (prime) crew. The training session simulated activity on the second day in Earth orbit.

ISS047e056031 (04/12/2016) --- NASA astronaut Tim Kopra, Commander of Expedition 47, floats inside the Russian segment on Cosmonautics Day 2016. Behind him are photographs (left to right) of Konstantin Tsiolkovsky, a Russian rocket scientist and pioneer of rocketry and astronautics, Sergei Korolev, the lead Soviet rocket and spacecraft engineer during the Space Race, Yuri Gagarin, the first human to fly in outer space, and a photo of Gagarin and Korolev together. Apr. 12, 2016 marked the 55th anniversary of Gagarin’s flight.

KENNEDY SPACE CENTER, FLA. -- Former astronaut Thomas Staford visits KSC, shown here at the Apollo Saturn V Center. He is standing in front of the module he flew Stafford logged his fourth space flight as Apollo commander of the Apollo-Soyuz Test Project (ASTP) mission, July 15-24, 1975, a joint space flight culminating in the historic first meeting in space between American astronauts and Soviet cosmonauts.

AST-05-298 (17-19 July 1975) --- Astronaut Donald K. Slayton and cosmonaut Aleksey A. Leonov are seen together in the Soyuz Orbital Module during the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. Slayton is the docking module pilot of the American crew. Leonov is the Soviet crew commander. This picture was taken with a 35mm camera.

S75-21892 (20 Feb. 1975) --- Astronaut Thomas P. Stafford (left) and cosmonaut Aleksey A. Leonov participate in Apollo-Soyuz Test Project joint crew training in Building 35 at NASA's Johnson Space Center. Stafford and Leonov are the commanders of their respective prime crews. They are in the Soviet Soyuz Orbital Module mock-up. This picture was taken during a ?walk-through? of the second day?s activities in Earth orbit.

S75-22856 (25 Feb. 1975) --- An interior view of the Soyuz orbital module mock-up in Building 35 during Apollo-Soyuz Test Project joint crew training at NASA's Johnson Space Center. The ASTP crewmen are astronaut Vance D. Brand (on left), command module pilot of the American ASTP prime crew; and cosmonaut Valeriy N. Kubasov, engineer on the Soviet ASTP first (prime) crew. The training session simulated activities on the second day in Earth orbit. Photo credit: NASA

S74-29041 (September 1974) --- The commanders of the American astronaut and Soviet cosmonaut crews for the joint U.S.?USSR Apollo-Soyuz Test Project mission compare notes in a Soyuz spacecraft?s orbital module mock-up in Building 35 at the Johnson Space Center during a training and simulation exercise. They are Aleksey A. Leonov, right, and Thomas P. Stafford. The hatchway in the background leads to the Docking Module. The prime crewmen, along with backup crewmen, are training in both the U.S. and USSR for the joint mission scheduled for the summer of 1975.

S75-22194 (25 Feb. 1975) --- An interior view of the Soyuz orbital module mock-up in Building 35 during Apollo-Soyuz Test Project joint crew training at NASA's Johnson Space Center. The two ASTP crewmen are looking over a checklist. They are astronaut Thomas P. Stafford (left), commander of the American ASTP prime crew; and cosmonaut Aleksey A. Leonov, commander of the Soviet ASTP first (prime) crew. The training session simulated activity on the second day in Earth orbit.

AST-05-298 (17-19 July 1975) --- Astronaut Donald K. Slayton and cosmonaut Aleksey A. Leonov are seen together in the Soyuz Orbital Module during the joint U.S.-USSR Apollo-Soyuz Test Project docking mission in Earth orbit. Slayton is the docking module pilot of the American crew. Leonov is the Soviet crew commander. This picture was taken with a 35mm camera.

Views of the Apollo 11 Twentieth Anniversary Black Tie reception at the downtown Houston Hyatt Regency Hotel. Views include former JSC Directors Robert Gilruth and Christopher C. Kraft Jr. reminiscing with keynote speaker Walter Cronkite (39934); Apollo astronauts Tom Stafford (left) and Neil Armstrong (right) talk with former Soviet cosmonaut Alexei Leonov (center) at the gala (39935).

S75-21720 (14 Feb. 1975) --- Astronaut Alan L. Bean (foreground) and cosmonaut Aleksey A. Leonov participate in Apollo-Soyuz Test Project joint crew training in Building 35 at NASA's Johnson Space Center. They are in the Apollo Command Module trainer. The training session simulated activities on the first day in Earth orbit. Bean is the commander of the American ASTP backup crew. Leonov is the commander of the Soviet ASTP first (prime) crew.

AST-01-053 (17-19 July 1975) --- The Soviet Soyuz spacecraft is contrasted against a black-sky background in this photograph taken in Earth orbit. This view is looking toward the aft end of the Soyuz. Two solar panels protrude out from the spacecraft's Instrument Assembly Module. The ASTP astronauts and cosmonauts visited each other's spacecraft while the Soyuz and Apollo were docked in Earth orbit for two days.

The final launch of a Saturn rocket came on July 15, 1975 as part of the Apollo-Soyuz Test Project. Earlier that day, a Russian Soyuz spacecraft lifted off its launch pad at a Soviet launch site carrying three cosmonauts. Seven and one-half hours later, the U.S. Apollo spacecraft was launched with its crew of American astronauts. Rendezvous and docking of the two ships were accomplished on July 17. The two ships remained docked for two days, conducting joint experiments and exchanging national mementos. In this photograph, astronauts Donald Slayton and Thomas Stafford chat with cosmonaut Alexei Leonov during their visit to the Soyuz Orbital Module.

S74-20794 (23 April 1974) --- Cosmonaut Aleksey A. Leonov (center), commander of the Soviet crew of the joint U.S.-USSR Apollo-Soyuz Test Project mission, goes through familiarization training with a television camera during ASTP activity at the Johnson Space Center. Cosmonaut Valeriy N. Kubasov (right), engineer on Leonov?s crew, is looking on. An ASTP docking module mock-up is on the left. Interpreter K.S. Samofal is behind Kubasov. David Brooks, with JSC?s Crew Procedures Division, is in the left background. This phase of the ASTP communications training was conducted in JSC?s Building 35. The equipment being used in the picture is an early design of the Westinghouse TV camera.

S75-20361 (27 Feb. 1975) --- This is the American crew insignia of the joint United States-USSR Apollo-Soyuz Test Project (ASTP) scheduled to take place in July 1975. Of circular design, the insignia has a colorful border area, outlined in red, with the names of the five crew members and the words Apollo in English and Soyuz in Russian around an artist?s concept of the Apollo and Soyuz spacecraft about to dock in Earth orbit. The bright sun and the blue and white Earth are in the background. The white stars on the blue background represent American astronauts Thomas P. Stafford, commander; Vance D. Brand, command module pilot; and Donald (Deke) K. Slayton, docking module pilot. The dark gold stars on the red background represent Soviet cosmonauts Aleksey A. Leonov, commander, and Valeriy N. Kubasov, engineer. Soyuz and Apollo will be launched separately from the USSR and United States, and will dock and remain together for as long as two days. The three Apollo astronauts will enter Soyuz and the two Soviet cosmonauts will visit the Apollo spacecraft via a docking module. The Russian word ?soyuz? means ?union? in English.

ISS036-E-006695 (8 June 2013) --- Inside the Kibo laboratory of the Japan Aerospace Exploration Agency, the six Expedition 36 crew members position themselves for a videotaped tribute to cosmonaut Valentina Tereshkova, who on June 16 will mark the 50th anniversary of her 1963 launch aboard the Soviet Vostok-6 spacecraft. In the bottom half of the photo, left to right, are Expedition 36 Commander Pavel Vinogradov of Russia's Federal Space Agency (Roscosmos) and Flight Engineers Karen Nyberg of NASA and Alexander Misurkin of Roscosmos. In the top half of the photo are, left to right, Flight Engineers Luca Parmitano of the European Space Agency, Chris Cassidy of NASA, and Fyodor Yurchikhin of Roscosmos.

S75-26927 (July 1975) --- A close-up view of the Commemorative Plaque for the Apollo-Soyuz Test Project. Two plaques divided into four quarters each will be flown on the ASTP mission. A four-part plaque is completely assembled here. The American ASTP crew will carry the four U.S. quarter pieces aboard Apollo; and the Soviet ASTP crew will carry the four USSR quarter sections aboard Soyuz. The eight quarter pieces will be joined together to form two complete commemorative plaques after the two spacecraft rendezvous and dock in Earth orbit. One complete plaque then will be returned to Earth by the astronauts; and the other complete plaque will be brought back by the cosmonauts. The plaque is written in both English and Russian.

AST-02-096 (18 July 1975) --- This scene photograph from a rendezvous window of the American Apollo spacecraft in Earth orbit shows the Soviet Soyuz spacecraft contrasted against a black-sky background with a heavily cloud-covered Earth below. The three major components of the Soyuz are the spherical-shaped Orbital Module, the bell-shaped Descent Vehicle, the cylindrical-shaped Instrument Assembly Module. The docking system on the Orbital Module was specially designed to interface with the docking system on the Apollo's Docking Module. The ASTP astronauts and cosmonauts visited each other's spacecraft while the Soyuz and Apollo were docked in Earth orbit for two days.

CAPE CANAVERAL, Fla. – At the Apollo/Saturn V Center at NASA's Kennedy Space Center in Florida, Apollo astronaut Vance Brand is applauded during NASA's 40th Anniversary of Apollo Celebration of the July 1969 launch and landing on the moon. At left is Apollo astronaut Charlie Duke. Eight Apollo astronauts participated in the ceremony. Brand was Apollo command module pilot on the Apollo-Soyuz Test Project that resulted in the historic meeting in space between American astronauts and Soviet cosmonauts. The linkup of Apollo and Soyuz tested a unique, new docking system and demonstrated international cooperation in space. Photo credit: NASA/Kim Shiflett

AST-09-572 (17-18 July 1975) --- The Soviet Soyuz 19 spacecraft is photographed from the American Apollo spacecraft during the joint U.S.-USSR Apollo-Soyuz Test Project (ASTP) docking mission in Earth orbit. Earth is visible in the lower left corner. This picture was taken with a 70mm camera. The Apollo crew consisted of astronauts Thomas P. Stafford, commander; Donald K. "Deke" Slayton, docking module pilot; and Vance D. Brand, command module pilot. The Soyuz 19 crew consisted of cosmonauts Aleksei A. Leonov, command pilot; and Valeri N. Kubasov, flight engineer.

S75-21627 (13 Feb. 1975) --- Two crewmen of the joint U.S.-USSR Apollo-Soyuz Test Project mission participate in ASTP training in Building 35 at the Johnson Space Center. They are astronaut Vance D. Brand (left), command module pilot of the American ASTP prime crew; and cosmonaut Valeriy N. Kubasov, engineer on the Soviet ASTP first (prime) crew. They are in the Soyuz spacecraft orbital module mock-up. Brand and Kubasov are going through a walk-through simulation of the second day of activities in Earth orbit. Brand takes some pictures.

ISS036-E-006693 (8 June 2013) --- Inside the Kibo laboratory of the Japan Aerospace Exploration Agency, the six Expedition 36 crew members position themselves for a videotaped tribute to cosmonaut Valentina Tereshkova, who on June 16 will mark the 50th anniversary of her 1963 launch aboard the Soviet Vostok-6 spacecraft. In the bottom half of the photo, left to right, are Expedition 36 Commander Pavel Vinogradov of Russia's Federal Space Agency (Roscosmos) and Flight Engineers Karen Nyberg of NASA and Alexander Misurkin of Roscosmos. In the top half of the photo are, left to right, Flight Engineers Luca Parmitano of the European Space Agency, Chris Cassidy of NASA, and Fyodor Yurchikhin of Roscosmos.

S75-28504 (17 July 1975) --- The American ASTP crewmen search the skies for the Soviet Soyuz spacecraft in this humorous artwork by cosmonaut Aleksey A. Leonov. Astronauts Vance D. Brand, Donald K. Slayton and Thomas P. Stafford (left to right) sit astride the Apollo spacecraft and Docking Module ready to lasso Soyuz. The cartoon humorously depicts the approaching historic event of an American spacecraft rendezvousing and docking in Earth orbit with a USSR spacecraft, scheduled today (July 17, 1975). Aboard Soyuz are Leonov, crew commander, and his fellow cosmonaut, Valeriy N. Kubasov. Stafford is the Apollo crew commander. The U.S. and USSR crewmen will visit each other's spacecraft while the Apollo and Soyuz are docked in Earth orbit for two days. Leonov, an accomplished artist, specializes in paintings on space subjects. He has a number of paintings on public exhibit in his native land.

S75-29432 (17 July 1975) --- Astronaut Thomas P. Stafford (in foreground) and cosmonaut Aleksei A. Leonov make their historic handshake in space on July 17, 1975 during the joint U.S.-USSR Apollo Soyuz Test Project (ASTP) docking mission in Earth orbit. This picture was reproduced from a frame of 16mm motion picture film. The American and Soviet spacecraft were joined together in space for approximately 47 hours on July 17th, 18th, 19th, 1975. The Apollo crew consisted of astronauts Thomas P. Stafford, commander; Donald K. "Deke" Slayton, docking module pilot; Vance D. Brand, command module pilot. The Soyuz 19 crew consisted of cosmonauts Aleksei A. Leonov, command pilot; and Valeri N. Kubasov, flight engineer.

S74-20831 (November 1973) --- A group of astronauts and their cosmonaut hosts are photographed sightseeing on Red Square in the heart of Moscow during a tour of the Soviet capital. The Americans were in the USSR to participate in Apollo-Soyuz Test Project familiarization training on the Soyuz systems at the Cosmonaut Training Center (Star City) near Moscow. Astronaut Thomas P. Stafford (light coat, black cap), commander of the American ASTP crew, was head of the U.S. delegation to Star City. Astronaut Eugene A. Cernan (on Stafford?s left, light coat) is the Special Assistant to the American Technical Director of ASTP. The sightseeing group is walking in the direction of Lenin?s Mausoleum. The structure in the background is the Cathedral of the Intercession (St. Basil?s) Museum. The historic Kremlin complex is to the right. PHOTO COURTESY: USSR ACADEMY OF SCIENCES

AST-32-2686 (17-19 July 1975) --- The American Apollo spacecraft as seen in Earth orbit from the Soviet Soyuz 19 spacecraft during the joint U.S.-USSR Apollo Soyuz Test Project (ASTP) mission. The Command and Service Module (CSM) and Docking Module (DM) are contrasted against a black-sky background. Light reflected in the camera streaks the image. Note the docking mechanism and docking target on the DM. On the left the bell-shaped engine nozzle of the service propulsion system protrudes from the rear of the Service Module (SM). The American and Soviet spacecraft were joined together in space for approximately 47 hours on July 17, 18, 19, 1975. This picture was furnished by the USSR in an exchange of photography taken during the ASTP flight. The Apollo crew consisted of astronauts Thomas P. Stafford, commander; Donald K. "Deke" Slayton, docking module pilot; and Vance D. Brand, command module pilot. The Soyuz 19 crew consisted of cosmonauts Aleksei A. Leonov, command pilot; and Valeri N. Kubasov, flight engineer.

S75-25823 (February 1975) --- Cosmonaut Aleksei A. Leonov (left) and astronaut Thomas P. Stafford display the Apollo Soyuz Test Project (ASTP) commemorative plaque. The two commanders, of their respective crews, are in the Apollo Command Module (CM) trainer at Building 35 at NASA's Johnson Space Center (JSC). Two plaques divided into four quarters each will be flown on the ASTP mission. The American ASTP Apollo crew will carry the four United States quarter pieces aboard Apollo; and the Soviet ASTP Soyuz 19 crew will carry the four USSR quarter sections aboard Soyuz. The eight quarter pieces will be joined together to form two complete commemorative plaques after the two spacecraft rendezvous and dock in Earth orbit. One complete plaque then will be returned to Earth by the astronauts; and the other complete plaque will be brought back by the cosmonauts. The plaque is written in both English and Russian. The Apollo crew will consist of astronauts Thomas P. Stafford, commander; Donald K. "Deke" Slayton, docking module pilot; Vance D. Brand, command module pilot. The Soyuz 19 crew will consist of cosmonauts Aleksei A. Leonov, command pilot; and Valeri N. Kubasov, flight engineer.

S73-27666 (May-June 1973) --- A close-up view of the Soyuz spacecraft which was part of the Apollo-Soyuz Test Project exhibit at the 30th International Aeronautics and Space Exhibition held May 24 ? June 3, 1973 at the Le Bourget Airport in Paris, France. The ASTP exhibit was co-sponsored by the United States and the Union of Soviet Socialist Republics. An agreement between the U.S. and the USSR provides for the docking in Earth orbit of the Soyuz and Apollo in the summer of 1975. The Apollo spacecraft is out of view to the left. At the far left, a mock-up of a Docking Module connects the Apollo with the Soyuz. The spherical-shaped portion of the Soyuz is called the orbital section. The middle section with the lettering ?CCCP? (USSR) on it is called the cosmonauts? cabin. Two solar panels extend out from the machines and panel section.

AST-02-093 (18 July 1975) --- This scene photographed with a hand-held 70mm camera from a rendezvous window of the American Apollo spacecraft in Earth orbit shows the Soviet Soyuz spacecraft contrasted against a black-sky background with Earth's horizon below. The three major components of the Soyuz are the spherical-shaped Orbital Module (OM), the bell-shaped Descent Vehicle (DV) and the cylindrical-shaped instrument Assembly Module (AM). The docking system on the Orbital Module was specially designed to interface with the docking system on the Apollo's Docking Module (DM). The DM is visible very faintly at the bottom of the picture. The ASTP astronauts and cosmonauts visited each other's spacecraft while the Soyuz and Apollo were docked in Earth orbit for two days.

AST-01-056 (18 July 1975) --- An excellent view of the Soviet Soyuz spacecraft in Earth orbit, photographed from the American Apollo spacecraft during the joint U.S.-USSR Apollo-Soyuz Test Project (ASTP) docking mission in Earth orbit. The Soyuz is contrasted against a white-cloud background in this overhead view. The three major components of the Soyuz are the spherical-shaped Orbital Module, the bell-shaped Descent Vehicle and the cylindrical-shaped instrument Assembly Module from which two solar panels protrude. The docking system on the Orbital Module was specially designed to interface with the docking system on the Apollo's Docking Module. The ASTP astronauts and cosmonauts visited each other's spacecraft while the Soyuz and Apollo were docked in Earth orbit for two days. The Apollo crew consisted of astronauts Stafford, commander; Donald K. "Deke" Slayton, docking module pilot; and Vance D. Brand, command module pilot. The Soyuz 19 crew consisted of cosmonauts Leonov, command pilot; and Valeri N. Kubasov, flight engineer.

This artist's concept depicts the Apollo-Soyuz Test Project (ASTP), the first international docking of the U.S.'s Apollo spacecraft and the U.S.S.R.'s Soyuz spacecraft in space. The objective of the ASTP mission was to provide the basis for a standardized international system for docking of marned spacecraft. The Soyuz spacecraft, with Cosmonauts Alexei Leonov and Valeri Kubasov aboard, was launched from the Baikonur Cosmodrome near Tyuratam in the Kazakh, Soviet Socialist Republic, at 8:20 a.m. (EDT) on July 15, 1975. The Apollo spacecraft, with Astronauts Thomas Stafford, Vance Brand, and Donald Slayton aboard, was launched from Launch Complex 39B, Kennedy Space Center, Florida, at 3:50 p.m. (EDT) on July 15, 1975. The Primary objectives of the ASTP were achieved. They performed spacecraft rendezvous, docking and undocking, conducted intervehicular crew transfer, and demonstrated the interaction of U.S. and U.S.S.R. control centers and spacecraft crews. The mission marked the last use of a Saturn launch vehicle. The Marshall Space Flight Center was responsible for development and sustaining engineering of the Saturn IB launch vehicle during the mission.

This artist's concept depicts the Apollo-Soyuz Test Project (ASTP) with insets of photographs of three U.S. astronauts (Thomas Stafford, Vance Brand, and Donald Slayton) and two U.S.S.R. cosmonauts (Alexei Leonov and Valeri Kubasov). The objective of the ASTP mission was to accomplish the first docking of a standardized international system, the U.S.'s Apollo spacecraft and the U.S.S.R.'s Soyuz spacecraft, in space. The Soyuz spacecraft was launched from the Baikonur Cosmodrome near Tyuratam in the Kazakh, Soviet Socialist Republic, at 8:20 a.m. (EDT) on July 15, 1975. The Apollo spacecraft was launched from Launch Complex 39B, Kennedy Space Center, Florida, at 3:50 p.m. (EDT) on July 15, 1975. The Primary objectives of the ASTP were achieved. They performed spacecraft rendezvous, docking and undocking, conducted intervehicular crew transfer, and demonstrated the interaction of U.S. and U.S.S.R. control centers and spacecraft crews. The mission marked the last use of a Saturn launch vehicle. The Marshall Space Flight Center was responsible for development and sustaining engineering of the Saturn IB launch vehicle during the mission.