International Docking Adapter #2 installation for SpaceX's CRS-9 mission.

International Docking Adapter #2 installation for SpaceX's CRS-9 mission.

International Docking Adapter #2 installation for SpaceX's CRS-9 mission.

International Docking Adapter #2 installation for SpaceX's CRS-9 mission.

The SpaceX Dragon Commercial Resupply Services-9 (CRS-9) spacecraft approaches the ISS for rendezvous and grapple operations. Earth provides the backdrop for this image.

A SpaceX Falcon 9 rocket lifts off from Launch Complex 39A at Kennedy Space Center in Florida at 11:17 a.m. EST on Dec. 6, 2020, carrying the uncrewed cargo Dragon spacecraft on its journey to the International Space Station for NASA and SpaceX’s 21st Commercial Resupply Services (CRS-21) mission. Dragon will deliver more than 6,400 pounds of science investigations and cargo to the orbiting laboratory. The mission marks the first launch for SpaceX under NASA’s CRS-2 contract.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Stephanie Martin of NASA Communications, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

iss048e065818 (8/24/2016) --- NASA astonaut Kate Rubins poses for a photo next to Polar Facilities 2 and 4 installed in the SpaceX Dragon Commercial Resupply Services-9 (CRS-9) spacecraft for return to Earth. Polar is a Cold Stowage managed facility that provides transport and storage of science samples at cryogenic temperatures (-80ºC) to and from the International Space Station (ISS).

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen in this long exposure as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, at sunrise Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, early Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it makes its final approach to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

A worker watches the Orbital ATK rocket closely just before it makes its final approach to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Saturday, May 19, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen just before it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen just before it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

Workers survey the Orbital ATK rocket just before it makes its final approach to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, early Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The controller for an Orbital ATK rocket is seen just before it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen just before it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Saturday, May 19, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen as it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Saturday, May 19, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Monday, May 21, 2018 at NASA's Wallops Flight Facility in Virginia. Orbital ATK’s ninth contracted cargo resupply mission with NASA to the International Space Station will deliver approximately 7,400 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew. Photo Credit: (NASA/Aubrey Gemignani)

An Orbital ATK rocket is seen in this long exposure, as workers prepare to roll it out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Stephanie Martin of NASA Communications, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, and Jessica Jensen, SpaceX director of Dragon Mission Management, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, and Jessica Jensen, SpaceX director of Dragon Mission Management, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Jessica Jensen, SpaceX director of Dragon Mission Management, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Stephanie Martin of NASA Communications, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, and Jessica Jensen, SpaceX director of Dragon Mission Management, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, congratulates Jessica Jensen, SpaceX director of Dragon Mission Management, following the successful liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, and Jessica Jensen, SpaceX director of Dragon Mission Management, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Ven Feng, manager of the Transportation Integration Office for the International Space Station Program, congratulates Jessica Jensen, SpaceX director of Dragon Mission Management, following the successful liftoff of SpaceX CRS-13. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-13 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 10:36 a.m. EST with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, Hans Koenigsmann, vice president of Build and Flight Reliability for SpaceX, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-16. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-16 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 1:16 p.m. EST, Dec. 5, 2018, with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, Joel Montalbano, deputy International Space Station program manager at NASA's Johnson Space Center in Houston, left, and Hans Koenigsmann, vice president of Build and Flight Reliability for SpaceX, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-16. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-16 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 1:16 p.m. EST, Dec. 5, 2018, with supplies and equipment and new science experiments for technology research.

After boosting a Dragon spacecraft on its way to the International Space Staton for the SpaceX CRS-13 mission, the Falcon 9 first stage returns to Landin Zone 1 at Cape Canaveral Air Force Station. The rocket lifted off moments earlier from Space Launch Complex 40 at the Cape on the company's 13th commercial resupply services mission to the space station. Dragon will deliver additional supplies and research experiments that improve life on Earth and drive progress toward future space exploration.

After boosting a Dragon spacecraft on its way to the International Space Staton for the SpaceX CRS-13 mission, the Falcon 9 first stage returns to Landin Zone 1 at Cape Canaveral Air Force Station. The rocket lifted off moments earlier from Space Launch Complex 40 at the Cape on the company's 13th commercial resupply services mission to the space station. Dragon will deliver additional supplies and research experiments that improve life on Earth and drive progress toward future space exploration.

After boosting a Dragon spacecraft on its way to the International Space Staton for the SpaceX CRS-13 mission, the Falcon 9 first stage returns to Landin Zone 1 at Cape Canaveral Air Force Station. The rocket lifted off moments earlier from Space Launch Complex 40 at the Cape on the company's 13th commercial resupply services mission to the space station. Dragon will deliver additional supplies and research experiments that improve life on Earth and drive progress toward future space exploration.

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is prepared to be raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is prepared to be raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

The International Docking Adapter 3, a critical component for future crewed missions to the International Space Station, is carefully packed away in the unpressurized “trunk” section of the SpaceX Dragon spacecraft at the SpaceX facility on Cape Canaveral Air Force Station in Florida on June 19. It will launch to the orbiting laboratory in July on the company’s 18th commercial resupply mission. The adapter will support future U.S. crewed vehicles visiting the station.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Joshua Santora of NASA Communications, Joel Montalbano, deputy International Space Station program manager at NASA's Johnson Space Center in Houston, and Hans Koenigsmann, vice president of Build and Flight Reliability for SpaceX, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-16. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-16 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 1:16 p.m. EST, Dec. 5, 2018, with supplies and equipment and new science experiments for technology research.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, from left, Joshua Santora of NASA Communications, Joel Montalbano, deputy International Space Station program manager at NASA's Johnson Space Center in Houston, and Hans Koenigsmann, vice president of Build and Flight Reliability for SpaceX, speak to media at a post-launch news conference following the liftoff of SpaceX CRS-16. The flight is a commercial resupply services mission to the International Space Station. SpaceX CRS-16 lifted off atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station at 1:16 p.m. EST, Dec. 5, 2018, with supplies and equipment and new science experiments for technology research.

The remaining time-sensitive payloads bound for the International Space Station on SpaceX’s 21st Commercial Resupply Services (CRS-21) mission are loaded into the Cargo Dragon spacecraft on Friday, Dec. 4, 2020. A SpaceX Falcon 9 rocket, carrying the Cargo Dragon, lifted off from Launch Complex 39A at Kennedy Space Center in Florida at 11:17 a.m. EST on Dec. 6, 2020. The spacecraft is delivering more than 6,400 pounds of science investigations and cargo to the orbiting laboratory.

In the Kennedy Space Center’s Press Site auditorium, Tori McLendon of NASA Communications, speaks to members of the media during a prelaunch news conference for the SpaceX CRS-16 commercial resupply services mission to the International Space Station. A Dragon spacecraft is scheduled to be launched from Space Launch Complex 40 at Cape Canaveral Air Force Station. The SpaceX Falcon 9 rocket will lift off on the company's 16th Commercial Resupply Services mission to the space station.

In the Kennedy Space Center’s Press Site auditorium, Kirt Costello, International Space Station program chief scientist at NASA's Johnson Space Center in Houston, speaks to members of the media during a prelaunch news conference for the SpaceX CRS-16 commercial resupply services mission to the International Space Station. A Dragon spacecraft is scheduled to be launched from Space Launch Complex 40 at Cape Canaveral Air Force Station. The SpaceX Falcon 9 rocket will lift off on the company's 16th Commercial Resupply Services mission to the space station.

The SpaceX Falcon 9 rocket with the Dragon cargo module climbs upward after liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module climbs upward after liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module climbs upward after liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module climbs upward after liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module climbs upward after liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.

The SpaceX Falcon 9 rocket with the Dragon cargo module lifts off Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida in the early morning May 4, 2019. Liftoff was at 2:48 a.m. EDT. This is SpaceX’s 17th Commercial Resupply Services (CRS-17) mission for NASA to the International Space Station. The Dragon cargo module will deliver about 5,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew.