Kathy Lueders, associate administrator, Human Exploration and Operations Mission Directorate, NASA Headquarters, participates in a preflight briefing for NASA’s SpaceX Crew-1 mission on Sept. 29, 2020. NASA’s SpaceX Crew-1 mission is the first crew rotational flight of a U.S. commercial spacecraft with astronauts to the International Space Station. The Crew-1 mission will launch from Launch Complex 39A at Kennedy Space Center in Florida. Crew-1 is part of NASA's Commercial Crew Program, which has returned human spaceflight capabilities to the U.S.

JSC2009-E-087200 (23 April 2009) --- Astronaut John Grunsfeld, STS-125 mission specialist, fields a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087199 (23 April 2009) --- Astronaut Michael Good, STS-125 mission specialist, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087197 (23 April 2009) --- Astronaut Megan McArthur, STS-125 mission specialist, fields a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087196 (23 April 2009) --- Astronaut Gregory C. Johnson, STS-125 pilot, is pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087202 (23 April 2009) --- Astronaut Scott Altman, STS-125 commander, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087212 (23 April 2009) --- Astronauts Mike Massimino (left) and Andrew Feustel, both STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087203 (23 April 2009) --- Astronauts Megan McArthur, John Grunsfeld (second left), Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087208 (23 April 2009) --- Astronauts Michael Good (left), Megan McArthur, John Grunsfeld, Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087220 (23 April 2009) --- Astronaut Mike Massimino (right), STS-125 mission specialist, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center. Astronaut John Grunsfeld, mission specialist, is at left.

JSC2009-E-087209 (23 April 2009) --- Astronauts Gregory C. Johnson (partially out of frame at left), STS-125 pilot; Michael Good, Megan McArthur, John Grunsfeld and Mike Massimino, all mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

S61-04546 (1961) --- Astronaut John H. Glenn Jr., pilot of the Mercury-Atlas 6 (MA-6) "Friendship 7" mission, takes part in spacecraft systems briefing during preflight activity at Cape Canaveral, Florida. Photo credit: NASA

Date:04-08-2014 Location:B9NW ISS Trainers Subject:Photograph ISS One Year Crew training with Scott Kelly, Gennady Padalka and Mikahil Kornienko during Emergency Scenario Training 1. Photograph crew interaction with trainers, during briefings, in mockup facility, each other, individual photos of crew members in mockup, etc. Post on IO/ISS Missions/Soyuz 42 Long Duration/Preflight. Photog: David DeHoyos

JSC2006-E-34241 (11 August 2006) --- The STS-115 crew posed for photos following its August 11 preflight press briefing at the Johnson Space Center. From the left are astronauts Joseph R. Tanner, Heidemarie M. Stefanyshyn-Piper, Brent W. Jett Jr., Christopher J. Ferguson, Steven G. MacLean (Canadian Space Agency) and Daniel C. Burbank.

Date:04-08-2014 Location:B9NW ISS Trainers Subject:Photograph ISS One Year Crew training with Scott Kelly, Gennady Padalka and Mikahil Kornienko during Emergency Scenario Training 1. Photograph crew interaction with trainers, during briefings, in mockup facility, each other, individual photos of crew members in mockup, etc. Post on IO/ISS Missions/Soyuz 42 Long Duration/Preflight. Photog: David DeHoyos

Date:04-08-2014 Location:B9NW ISS Trainers Subject:Photograph ISS One Year Crew training with Scott Kelly, Gennady Padalka and Mikahil Kornienko during Emergency Scenario Training 1. Photograph crew interaction with trainers, during briefings, in mockup facility, each other, individual photos of crew members in mockup, etc. Post on IO/ISS Missions/Soyuz 42 Long Duration/Preflight. Photog: David DeHoyos

S84-40185 (08/21/1984) --- stronaut preflight Press Conference with the STS-41D Crew with Public Affairs Office (PAO) Reprentative Steve Nesbitt in the foreground in the Bldg 2 Briefing Room on 08/17/1984. Crewmembers visible (R-L) are: Henry W. Hartsfield, Jr., Crew Commander; Michael L. Coats, Pilot: Richard M. (Mike) Mullane, Steven A. Hawley, Judith A. Resnik - all Mission Specialists: and, Charlie D. Walker, Payload Specialist. JSC, Houston, TX

JSC2005-E-14182 (7 April 2005) --- Paul Hill (left center), STS-114 Lead Shuttle Flight Director; LeRoy Cain, Ascent/Entry Flight Director; and Mark Ferring, Lead ISS Flight Director, speak with various news media representatives following an STS-114 preflight press briefing in the Teague Auditorium at the Johnson Space Center (JSC).

JSC2001-E-05534 (28 February 2001) --- The STS-102 crew fields questions from various news media representatives at a press briefing at the Johnson Space Center (JSC). From the right are astronauts James M. Kelly, pilot; and Andrew S.W. Thomas and Paul W. Richards, both mission specialists; cosmonaut Yury V. Usachev, and astronauts James S. Voss and Susan J. Helms, all mission specialists. Astronaut James D. Wetherbee, STS-102 commander, is out of frame at right. Expedition Two commander Usachev, representing Rosaviakosmos, will join Voss and Helms in the first crew exchange aboard the Earth-orbiting International Space Station (ISS) at some point following the docking of the outpost and the Space Shuttle Discovery.

JSC2001-E-05535 (28 February 2001) --- The STS-102 crew fields questions from various news media representatives at a press briefing at the Johnson Space Center (JSC). From the right are astronauts James D. Wetherbee, mission commander; James M. Kelly, pilot; and Andrew S.W. Thomas and Paul W. Richards, both mission specialists. Out of frame at left are cosmonaut Yury V. Usachev, and astronauts James S. Voss and Susan J. Helms, all of whom will fulfill STS-102 mission specialist rolls until some point after the Space Shuttle Discovery links up with the International Space Station (ISS). Expedition Two commander Usachev, representing Rosaviakosmos, will join Voss and Helms in the first crew exchange aboard the Earth-orbiting International Space Station (ISS).

JSC2001-E-05533 (28 February 2001) --- Astronaut Paul W. Richards, STS-102 mission specialist, responds to a news media representative's question during a press briefing at the Johnson Space Center (JSC).

S75-28229 (8 July 1975) --- The three American ASTP prime crew astronauts participate in a photography mission briefing in Building 5 with Dr. Farouk El-Baz (wearing face mask) during Apollo-Soyuz Test Project preflight activity at NASA's Johnson Space Center. They are, left to right, Thomas P. Stafford, commander; Vance D. Brand, command module pilot; Dr. El-Baz; and Donald K. Slayton, docking module pilot. Dr. El-Baz is with the Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution. The face mask is to protect the crewmen from possible exposure to disease prior to launch time. Photo credit: NASA

JSC2001-E-05530 (28 February 2001) --- Astronaut James D. Wetherbee, STS-102 mission commander, follows a news representative's question with a brief explanation during a press briefing at the Johnson Space Center (JSC).

JSC2007-E-35091 (11 July 2007) --- Astronauts Barbara R. Morgan and Canadian Space Agency's Dave Williams, both STS-118 mission specialist, speak to an audience of students and media during a preflight education event in the Olin Teague Auditorium at the Johnson Space Center.

JSC2001-E-05531 (28 February 2001) --- Astronaut James M. Kelly, STS-102 pilot, responds to a news media representative's question during a press briefing at the Johnson Space Center (JSC).

JSC2001-E-05529 (28 February 2001) --- Astronaut Paul W. Richards, STS-102 mission specialist, responds to a news representative's question during a press briefing at the Johnson Space Center (JSC).

Views of the STS-31/61B Crew during Emergency Egress Training, Bldg. 9A, 10/28/1985; and, the Crew Preflight Press Conference, Bldg. 2, 10/24/1985. 1. STS-31/61B - CREW TRAINING (EMERGENCY EGRESS) JSC, HOUSTON, TX

JSC2001-E-05523 (28 February 2001) --- The STS-102 crew fields questions from various news media representatives at a press briefing at the Johnson Space Center (JSC). From the right are astronauts James D. Wetherbee, mission commander; James M. Kelly, pilot; and Andrew S.W. Thomas, Paul W. Richards, and cosmonaut Yury V. Usachev, James S. Voss and Susan J. Helms, all mission specialists. Expedition Two commander Usachev, representing Rosaviakosmos, will join flight engineers Voss and Helms in the first crew exchange aboard the Earth-orbiting International Space Station (ISS).

JSC2001-E-05526 (28 February 2001) --- Astronaut James M. Kelly, STS-102 pilot, greets the press during a briefing at the Johnson Space Center (JSC).

JSC2001-E-05527 (28 February 2001) --- Astronaut Andrew S.W. Thomas, STS-102 mission specialist, greets the news media during a press briefing at the Johnson Space Center (JSC).

CAPE CANAVERAL, Fla. – John Grotzinger, project scientist for Mars Science Laboratory (MSL) at the California Institute of Technology in Pasadena, Calif., demonstrates the operation of MSL's rover, Curiosity, during a science briefing at NASA's Kennedy Space Center in Florida, part of preflight activities for the MSL mission. Michael Malin, principal investigator for the Mast Camera and Mars Descent Imager investigations on Curiosity from Malin Space Science Systems, looks on at right. MSL’s components include a car-sized rover, Curiosity, which has 10 science instruments designed to search for signs of life, including methane, and help determine if the gas is from a biological or geological source. Launch of MSL aboard a United Launch Alliance Atlas V rocket is scheduled for Nov. 26 from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. For more information, visit http://www.nasa.gov/msl. Photo credit: NASA/Kim Shiflett

Elon Musk, SpaceX Chief Engineer participates in a SpaceX Demonstration Mission 2 Launch Briefing at the Neil A. Armstrong Operations and Checkout Building following the departure of NASA astronauts Robert Behnken and Douglas Hurley for Launch Complex 39A to board a SpaceX Crew Dragon spacecraft for launch, Wednesday, May 27, 2020, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Demo-2 mission is the first launch with astronauts of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. The test flight serves as an end-to-end demonstration of SpaceX’s crew transportation system. Today’s launch of Behnken and Hurley was scrubbed due to weather and is now scheduled for 3:22 p.m. EDT on Saturday, May 30, from Launch Complex 39A at the Kennedy Space Center. A new era of human spaceflight is set to begin as American astronauts once again launch on an American rocket from American soil to low-Earth orbit for the first time since the conclusion of the Space Shuttle Program in 2011. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine participates in a SpaceX Demonstration Mission 2 Launch Briefing at the Neil A. Armstrong Operations and Checkout Building following the departure of NASA astronauts Robert Behnken and Douglas Hurley for Launch Complex 39A to board a SpaceX Crew Dragon spacecraft for launch, Wednesday, May 27, 2020, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Demo-2 mission is the first launch with astronauts of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. The test flight serves as an end-to-end demonstration of SpaceX’s crew transportation system. Today’s launch of Behnken and Hurley was scrubbed due to weather and is now scheduled for 3:22 p.m. EDT on Saturday, May 30, from Launch Complex 39A at the Kennedy Space Center. A new era of human spaceflight is set to begin as American astronauts once again launch on an American rocket from American soil to low-Earth orbit for the first time since the conclusion of the Space Shuttle Program in 2011. Photo Credit: (NASA/Bill Ingalls)

CAPE CANAVERAL, Fla. – NASA’s Kennedy Space Center in Florida is host to a Mars Science Laboratory (MSL) science briefing as part of preflight activities for the MSL mission. From left, NASA Public Affairs Officer Guy Webster moderates the conference featuring Michael Meyer, lead scientist for NASA Mars Exploration Program; John Grotzinger, project scientist for Mars Science Laboratory California Institute of Technology, Pasadena, Calif.; Michael Malin, principal investigator for the Mast Camera and Mars Descent Imager investigations on Curiosity, Malin Space Science Systems; Roger Wiens, principal investigator for Chemistry and Camera investigation on Curiosity, Los Alamos National Laboratory; David Blake, NASA principal investigator for Chemistry and Mineralogy investigation on Curiosity, NASA Ames Research Center; and Paul Mahaffy, NASA principal investigator for Sample Analysis at Mars investigation on Curiosity, NASA Goddard Space Flight Center. MSL’s components include a car-sized rover, Curiosity, which has 10 science instruments designed to search for signs of life, including methane, and help determine if the gas is from a biological or geological source. Launch of MSL aboard a United Launch Alliance Atlas V rocket is scheduled for Nov. 26 from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. For more information, visit http://www.nasa.gov/msl. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – NASA’s Kennedy Space Center in Florida is host to a Mars Science Laboratory (MSL) science briefing as part of preflight activities for the MSL mission. From left, NASA Public Affairs Officer Guy Webster moderates the conference featuring Michael Meyer, lead scientist for NASA Mars Exploration Program; John Grotzinger, project scientist for Mars Science Laboratory California Institute of Technology, Pasadena, Calif.; Michael Malin, principal investigator for the Mast Camera and Mars Descent Imager investigations on Curiosity, Malin Space Science Systems; Roger Wiens, principal investigator for Chemistry and Camera investigation on Curiosity, Los Alamos National Laboratory; David Blake, NASA principal investigator for Chemistry and Mineralogy investigation on Curiosity, NASA Ames Research Center; and Paul Mahaffy, NASA principal investigator for Sample Analysis at Mars investigation on Curiosity, NASA Goddard Space Flight Center. MSL’s components include a car-sized rover, Curiosity, which has 10 science instruments designed to search for signs of life, including methane, and help determine if the gas is from a biological or geological source. Launch of MSL aboard a United Launch Alliance Atlas V rocket is scheduled for Nov. 26 from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. For more information, visit http://www.nasa.gov/msl. Photo credit: NASA/Kim Shiflett

President Donald Trump participates in a SpaceX Demonstration Mission 2 Launch Briefing at the Neil A. Armstrong Operations and Checkout Building following the departure of NASA astronauts Robert Behnken and Douglas Hurley for Launch Complex 39A to board a SpaceX Crew Dragon spacecraft for launch, Wednesday, May 27, 2020, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Demo-2 mission is the first launch with astronauts of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. The test flight serves as an end-to-end demonstration of SpaceX’s crew transportation system. Today’s launch of Behnken and Hurley was scrubbed due to weather and is now scheduled for 3:22 p.m. EDT on Saturday, May 30, from Launch Complex 39A at the Kennedy Space Center. A new era of human spaceflight is set to begin as American astronauts once again launch on an American rocket from American soil to low-Earth orbit for the first time since the conclusion of the Space Shuttle Program in 2011. Photo Credit: (NASA/Bill Ingalls)

President Donald Trump participates in a SpaceX Demonstration Mission 2 Launch Briefing with NASA astronaut Nicole Mann, left, Kennedy Space Center Director Bob Cabana, Second Lady Karen Pence, Vice President Mike Pence, First Lady Melania Trump, NASA Administrator Jim Bridenstine, Elon Musk, SpaceX Chief Engineer, and NASA astronaut Kjell Lindgren, right at the Neil A. Armstrong Operations and Checkout Building following the departure of NASA astronauts Robert Behnken and Douglas Hurley for Launch Complex 39A to board a SpaceX Crew Dragon spacecraft for launch, Wednesday, May 27, 2020, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Demo-2 mission is the first launch with astronauts of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. The test flight serves as an end-to-end demonstration of SpaceX’s crew transportation system. Today’s launch of Behnken and Hurley was scrubbed due to weather and is now scheduled for 3:22 p.m. EDT on Saturday, May 30, from Launch Complex 39A at the Kennedy Space Center. A new era of human spaceflight is set to begin as American astronauts once again launch on an American rocket from American soil to low-Earth orbit for the first time since the conclusion of the Space Shuttle Program in 2011. Photo Credit: (NASA/Bill Ingalls)