S66-54571 (14 Sept. 1966) --- A 100-foot tether line connects the Agena Target Docking Vehicle with the Gemini-11 spacecraft during its 32nd revolution of Earth. Photo credit: NASA

S66-62953 (13 Nov. 1966) --- A 100-foot tether line connects the Agena Target Docking Vehicle with the Gemini-12 spacecraft during its 32nd revolution of Earth. Clouds over the Pacific Ocean are in the background. Photo credit: NASA

S66-45635 (26 Sept. 1966) --- Astronaut Charles Conrad Jr. (center), Gemini-11 prime crew command pilot, discusses the Gemini-11/Agena tether before a gathering of news media representatives in the MSC Building 1 auditorium. Holding an Agena model at right is astronaut Richard F. Gordon Jr., Gemini-11 pilot. Looking on at left is George M. Low, MSC Deputy Director. Photo credit: NASA

S66-62794 (13 Nov. 1966) --- Northern portion of Sonora, Mexico; southeastern Arizona and southwestern New Mexico, as seen from the Gemini-12 spacecraft during its 30th revolution of Earth. Includes the Tucson, Phoenix, Mogollon Rim, and Painted Desert areas. A 100-foot tether line connects the Agena Target Docking Vehicle with the Gemini-12 spacecraft. Photo credit: NASA.

S66-63517 (13 Nov. 1966) --- The Gulf of California area as seen from the Gemini-12 spacecraft during its 30th revolution of Earth. Baja California Sur is the peninsula on the left. At lower left is the mainland of Mexico. A 100-foot tether line connects the Agena Target Docking Vehicle with the Gemini-12 spacecraft. View is looking south. Photo credit: NASA

S66-54455 (13 Sept. 1966) --- Astronaut Richard F. Gordon Jr., Gemini-11 pilot, attaches a tether line from his spacecraft to the Agena Target Docking Vehicle (ATDV) during a spacewalk. This view was taken over the Atlantic Ocean at approximately 160 miles above Earth on Sept. 13, 1966. With the aid of the ATDV, Gordon and astronaut Charles (Pete) Conrad Jr., command pilot, set a new altitude record of 750 miles during the GT-11 mission. Photo credit: NASA

S66-54585 (12-15 Sept. 1966) --- The Agena Target Docking Vehicle at a distance of approximately 80 feet from the Gemini-11 spacecraft. This view was taken after the disconnect of the tether between the two vehicles. Crew members for the Gemini-11 mission are astronauts Charles Conrad Jr., command pilot, and Richard F. Gordon Jr., pilot. Photo credit: NASA

iss056e011980 (June 14, 2018) --- NASA astronaut Drew Feustel is pictured tethered to the International Space Station just outside of the Quest airlock during a spacewalk he conducted with fellow NASA astronaut Ricky Arnold (out of frame) on June 14, 2018. During the six-hour, 49-minute spacewalk the duo installed high-definition cameras to provide enhanced views of commercial crew spacecraft, including the SpaceX Crew Dragon and the Boeing Starliner, as they approach and dock with the orbital laboratory.

S66-54810 (14 Sept. 1966) --- The Agena Target Docking Vehicle is tethered to the Gemini-11 spacecraft during its 31st revolution of Earth. Area below is the Gulf of California and Baja California at La Paz. Taken with a J.A. Maurer 70mm camera, using Eastman Kodak, Ektachrome, MS (S.O. 368) color film. Photo credit: NASA

iss056e011989 (June 14, 2018) --- NASA astronaut Drew Feustel is pictured tethered to the International Space Station during a spacewalk he conducted with fellow NASA astronaut Ricky Arnold (out of frame) on June 14, 2018. During the six-hour, 49-minute spacewalk the duo installed high-definition cameras to provide enhanced views of commercial crew spacecraft, including the SpaceX Crew Dragon and the Boeing Starliner, as they approach and dock with the orbital laboratory.

S66-45605 (26 Sept. 1966) --- Movie film of the Gemini-11 extravehicular activity and rendezvous with the Agena Target Docking Vehicle was shown at the Gemini-11 press conference in the MSC Building 1 auditorium. Astronauts Charles Conrad Jr. (left), command pilot, and Richard F. Gordon Jr., pilot, discussed the Gemini-11 EVA and rendezvous mission during the film. Picture on screen shows close-up of astronaut Gordon connecting the Agena Target Vehicle to the spacecraft with a tether line during his spacewalk. Photo credit: NASA

S66-28075 (May 1966) --- Insignia of the Gemini IX spaceflight. Roman numeral indicates ninth flight in the Gemini series. Two spacecraft symbolize rendezvous and docking of Gemini with an Agena. Astronaut and umbilical (tether) line denote planned extravehicular activity (EVA). Astronauts Thomas P. Stafford, command pilot, and Eugene A. Cernan, pilot, are members of the Gemini IX prime crew. The NASA insignia design for Gemini flights is reserved for use by the astronauts and for other official use as the NASA Administrator may authorize. Public availability has been approved only in the form of illustrations by the various news media. When and if there is any change in this policy, which we do not anticipate, it will be publicly announced. Photo credit: NASA

S66-44308 (September 1966) --- Insignia of the Gemini-Titan XI (GT-11) spaceflight. Roman numeral indicates eleventh flight in the Gemini series. Two spacecraft symbolize rendezvous and docking of Gemini with an Agena. Astronaut and umbilical (tether) line denotes planned extravehicular activity. Astronauts Charles Conrad Jr., command pilot, and Richard F. Gordon Jr., pilot, are members of the Gemini-11 prime crew. The NASA insignia design for Gemini flights is reserved for use by the astronauts and for other official use as the NASA Administrator may authorize. Public availability has been approved only in the form of illustrations by the various news media. When and if there is any change in this policy, which we do not anticipate, it will be publicly announced. Photo credit: NASA