jsc2017e114835 (Aug. 22, 2018) --- 2017 NASA Astronaut Candidate Matthew Dominick.

jsc2017e067116 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Warren Hoburg in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067113 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Raja Chari in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067122 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Jasmin Moghbeli in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067124 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Zena Cardman in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067114 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Kayla Barron in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067117 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Jonny Kim in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067121 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Jessica Watkins in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067120 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Loral O'Hara in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067119 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Frank Rubio in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e067123 (June 6, 2017) --- NASA portrait of 2017 Astronaut Candidate Bob Hines in front of a T-38 trainer aircraft at Ellington Field near NASA’s Johnson Space Center in Houston, Texas.

NASA Administrator Jim Bridenstine asks a question of the 2017 astronaut candidates during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine introduces the 2017 astronaut candidates during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA astronaut candidate Matthew Dominick, third from right in the front row, answers a question during a live episode of the Administrator's monthly chat show, Watch This Space, along with fellow members of the 2017 astronaut candidate class, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine holds up the patch of the 2017 astronaut class during a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA's newest astronaut candidate class has started their two years of training, after which the new astronaut candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA’s new Orion spacecraft and Space Launch System rocket. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine poses for a picture with the 2017 astronaut candidate class after taping a live episode of the Administrator's monthly chat show, Watch This Space, Thursday, Sept. 27, 2018 in the Webb Auditorium at NASA Headquarters in Washington. NASA astronaut candidates, back row from left, Jonny Kim, Joshua Kutryk of the Canadian Space Agency, Jasmin Moghbeli, Loral O’Hara, Frank Rubio, Jennifer Sidey-Gibbons of the Canadian Space Agency, Jessica Watkins, front row from left, Kayla Barron, Zena Cardman, Raja Chari, Matthew Dominick, Bob Hines, and Warren Hoburg. Photo Credit: (NASA/Joel Kowsky)

NASA's 2017 astronaut candidate Kayla Barron practices flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to fly at supersonic speeds over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA's 2017 astronaut candidate Kayla Barron practices flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to fly at supersonic speeds over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA's 2017 astronaut candidate Kayla Barron practices flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to fly at supersonic speeds over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA’s 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where Jenni Sidey-Gibbons looks inside engine nozzle of F-15 jet. The F-15 will fly in tandem with the X-59 QueSST during early flight test stages for the X-59 development.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California (L to R) Jenni Sidey-Gibbons, Raja Chari, Loral O'Hara, Jasmin Moghbeli, Jonny Kim and Jessica Watkins look inside the engine nozzle of an F-15 jet. The F-15 will fly in tandem with the X-59 QueSST during early flight test stages for the X-59 development.

NASA's 2017 astronaut candidates (L to R) Zena Cardman, Loral O'Hara, Frank Rubio, Jonny Kim, Raja Chari practice flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to fly at supersonic speeds over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where Crew Chief Tom Grindle talks with (L to R) Jessica Watkins and Raja Chari near engine nozzle of F-15 jet. The F-15 will fly in tandem with the X-59 QueSST during early flight test stages for the X-59 development.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California (L to R) Raja Chari, Jenni Sidey-Gibbons, Loral O'Hara, Jasmin Moghbeli, Jonny Kim and Jessica Watkins look inside the engine nozzle of an F-15 jet. The F-15 will fly in tandem with the X-59 QueSST during early flight test stages for the X-59 development.

NASA's 2017 astronaut candidate Kayla Barron practices flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to fly at supersonic speeds over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA's 2017 astronaut candidates (L to R) Jenni Sidey-Gibbons, Jessica Watkins and Joshua Kutryk practice flying in an F-18 aircraft cockpit simulator at Armstrong Flight Research Center, in Southern California. The F-18's are flown for research support and pilot proficiency. Currently, the F-18 is conducting supersonic research in support of the X-59 QueSST overall mission.

NASA's 2017 astronaut candidates (L to R) Jessica Watkins and Jenni Sidey-Gibbons practice flying in an F-18 aircraft cockpit simulator at Armstrong Flight Research Center, in Southern California. The F-18's are flown for research support and pilot proficiency. Currently, the F-18's are being used to conduct supersonic research in support of the X-59 QueSST overall mission.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where (L to R) Loral O'Hara, Jenni Sidey-Gibbons and Raja Chari look inside the engine nozzle of an F-15 jet. The F-15 will fly in tandem with the X-59 QueSST during early flight test stages for the X-59 development.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where they checked out a F-15 cockpit. The center is using its fleet of supersonic research support aircraft for sonic boom research, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where they checked out a F-15 cockpit. The center is using its fleet of supersonic research support aircraft for sonic boom research, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

NASA’s 2017 astronaut candidates (L to R) Jonny Kim and Raja Chari practice flying in an X-59 QueSST simulator at Armstrong Flight Research Center, in Southern California. The low boom flight demonstrator, X-59, being built at Lockheed Martin and was designed to supersonically over land without the loud noise of breaking the sound barrier and disturbing communities.

NASA's 2017 astronaut candidate Matthew Dominick practices flying in the X-57 aircraft simulator at Armstrong Flight Research Center in Southern California. Starting with the fuselage of a Tecnam P20067T, the X-57 Maxwell electric propulsion airplane is being built from ideas being researched that could lead to the development of electric propulsion-powered aircraft, which would be quieter, more efficient and environmentally friendly than today's commuter aircraft.

NASA’s 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California where they checked out a F-15 cockpit. The center is using its fleet of supersonic research support aircraft for sonic boom research, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

jsc2017e118351 (Oct. 15, 2017) --- 2017 NASA Astronaut Candidate Jessica Watkins.

jsc2017e118421 (Oct. 25, 2017) --- 2017 NASA Astronaut Candidate Kayla Baron.

jsc2017e114853 (Aug. 22, 2017) --- 2017 NASA Astronaut Candidate Raja Chari.

jsc2017e116316 (Sept. 15, 2017) --- 2017 NASA Astronaut Candidate Zena Cardman.

jsc2017e114858 (Aug. 22, 2017) --- 2017 NASA Astronaut Candidate Bob Hines.

jsc2017e116310 (Sept. 15, 2017) --- 2017 NASA Astronaut Candidate Jasmin Moghbeli.

jsc2017e118314 (Oct. 24, 2017) --- 2017 NASA Astronaut Candidate Warren Hoburg.

jsc2017e118354_alt (Oct. 19, 2017) --- 2017 NASA Astronaut Candidate Jonny Kim.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California. After tour of aircraft hangar and briefing on the use of aircraft for flight research, the astronauts practiced flying the X-57 simulator. Starting with the fuselage of a Tecnam P20067T, the X-57 Maxwell electric propulsion airplane is being built and could lead to the development of electric propulsion-powered aircraft, which would be quieter, more efficient and environmentally friendly than today's commuter aircraft.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California. On the right, NASA's, X-59 pilot Nils Larsen, briefs the astronauts as they look at Armstrong's fleet of supersonic research support aircraft, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

NASA’s 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California. On the right, NASA’s, X-59 pilot Nils Larsen, briefs the astronauts as they look at Armstrong’s fleet of supersonic research support aircraft, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

NASA's 2017 astronaut candidates toured aircraft hangar at Armstrong Flight Research Center, in Southern California. On the right, NASA's, X-59 pilot Nils Larsen, briefs the astronauts as they look at Armstrong's fleet of supersonic research support aircraft, including the F-15, which will fly in tandem with the X-59 QueSST during early flight test stages, and the F-18, which is conducting supersonic research in support of the overall mission.

jsc2017e116312 (Oct. 24, 2017) --- 2017 Canadian Space Agency Astronaut Candidate Josh Kutryk.

jsc2017e118337 (Oct. 25, 2017) --- 2017 Canadian Space Agency Astronaut Candidate Jenny Sidey.

NASA’s 2017 astronaut candidates (L to R) Jessica Watkins, Zena Cardman, Kayla Barron toured aircraft hangar at Armstrong Flight Research Center, in Southern California where they were briefed on the use of Armstrong's F-15 and F-18 aircraft for studying sonic booms. The aircraft will be used during the development of the low-boom X-59 aircraft that is planned to fly supersonically over land, which is not allowed at this time because of the loud noise created when flying beyond the speed of sound.

NASA's 2017 astronaut candidates (L to R) Bob Hines, Matthew Dominick and Jasmin Moghbeli practice flying in X-57 aircraft simulator at Armstrong Flight Research Center in Southern California. Starting with the fuselage of a Tecnam P20067T, the X-57 Maxwell electric propulsion airplane is being built from ideas being researched that could lead to the development of electric propulsion-powered aircraft, which would be quieter, more efficient and environmentally friendly than today's commuter aircraft.

NASA’s 2017 astronaut candidates (L to R) Jessica Watkins, Jenni Sidey-Gibbons, Joshua Kutryk, and Jasmin Moghbeli practice flying in an F-18 aircraft cockpit simulator at Armstrong Flight Research Center, in Southern California. The F-18’s are flown for research support and pilot proficiency. Currently, the F-18’s are being used to conduct supersonic research in support of the X-59 QueSST overall mission.

jsc2017e114808 (Aug. 22, 2018) --- 2017 NASA Astronaut Candidate Loral O'Hara.

jsc2017e114795 (Aug. 22, 2018) --- 2017 NASA Astronaut Candidate Frank Rubio.

jsc2017e119012 (September 21, 2017) --- 2017 NASA astronaut candidate Warren Hoburg readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e119000 (September 21, 2017) --- 2017 NASA astronaut candidate Warren Hoburg readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118962 (September 21, 2017) --- 2017 NASA astronaut candidate Zena Cardman readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118970 (September 21, 2017) --- 2017 NASA astronaut candidate Frank Rubio readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118973 (September 21, 2017) --- 2017 NASA astronaut candidate Jessica Watkins readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118989 (September 21, 2017) --- 2017 NASA astronaut candidate Jonny Kim readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118966 (September 21, 2017) --- 2017 NASA astronaut candidate Loral O’Hara readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118959 (September 21, 2017) --- 2017 NASA astronaut candidate Zena Cardman readies for helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e067274 (June 6, 2017) --- NASA’s 2017 Astronaut Candidate Class stopped for a group photo while getting fitted for flight suits at Ellington Airport near NASA’s Johnson Space Center in Houston, Texas.

jsc2017e118967 (September 21, 2017) --- 2017 NASA astronaut candidate Loral O’Hara undergoes helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e118991 (September 21, 2017) --- 2017 NASA astronaut candidate Jonny Kim undergoes helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e067273 (June 6, 2017) --- NASA’s 2017 Astronaut Candidate Class stopped for a group photo while getting fitted for flight suits at Ellington Airport near NASA’s Johnson Space Center in Houston, Texas.

NASA’s 2017 astronaut candidates (L to R) Raja Chari, Bob Hines, Joshua Kutryk, Jasmin Moghbeli, Jonny Kim, and Jessica Watkins toured aircraft hangar at Armstrong Flight Research Center, in Southern California. On the left, NASA’s, X-59 pilot, briefs them on use of F-15 for studying sonic booms during the development of the low-boom X-59 aircraft that is planned to fly supersonically over land. Low-level supersonic flight is not allowed at this time because of the loud noise levels generated when flying beyond the speed of sound.

NASA's 2017 astronaut candidates, (L to R) Jonny Kim, Frank Rubio, Jasmin Moghbeli, Raja Chari, Woody Hoburg, Jessica Watkins, Joshua Kutryk, Loral O'Hara, Bob Hines, Zena Cardman, Kayla Barron, Jenni Sidey-Gibbons, Matthew Dominick pose in front of X-1E at the end of their visit to Armstrong Flight Research Center, in Southern California.

jsc2018e060323 (06/20/2018) --- 2017 NASA astronaut candidate Jasmin Moghbeli and Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons during earth and planetary science training in Rio Grande del Norte National Monument Upper Gorge Area near Questa, N.M. Photo Credit: (NASA/Norah Moran)

jsc2019e054874 (09-16-19) --- 2017 NASA astronaut candidate Frank Rubio during geology training in Arizona. Photo Credit: (NASA/Bill Stafford)

jsc2019e054997 (09-16-19) --- 2017 NASA astronaut candidates gather for data collection during geology training in Arizona. Photo Credit: (NASA/Bill Stafford)

jsc2019e054910 (09-16-19) --- 2017 NASA astronaut candidate Kayla Barron during geology training in Arizona. Photo Credit: (NASA/Bill Stafford)

jsc2019e054977 (09-16-19) --- 2017 NASA astronaut candidates gather during geology training in Arizona. Photo Credit: (NASA/Bill Stafford)

jsc2019e054955 (09-16-19) --- 2017 NASA astronaut candidate Bob Hines during geology training in Arizona. Photo Credit: (NASA/Bill Stafford)

jsc2017e118972 (September 21, 2017) --- (From left) 2017 NASA astronaut candidates Jessica Watkins and Frank Rubio and Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons are lowered into the training pool during helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e067166 (06/07/2017) --- United States Vice President Mike Pence congratulates NASA's 12 new astronaut candidates at the agency's Johnson Space Center in Houston. The 2017 astronaut candidate class -- Kayla Barron, Zena Cardman, Raja Chari, Matthew Dominick, Bob Hines, Warren “Woody” Hoburg, Jonathan Kim, Robb Kulin, Jasmin Moghbeli, Loral O’Hara, Francisco Rubio and Jessica Watkins – were chosen from amid a record number of people applying. Photo Credit: (NASA/James Blair)

jsc2017e111693 (08-23-2017) --- (From left, foreground) 2017 NASA astronaut candidates Jessica Watkins, Loral O’Hara, (from left, background) Zena Cardman and Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. (NASA/David DeHoyos)

jsc2018e052122 (May 30, 2018) --- (From left) 2017 NASA astronaut candidate Jonny Kim prepares for his next assignment as Canadian Space Agency astronaut candidates Joshua Kutryk (standing), Jennifer Sidey-Gibbons, and NASA astronaut candidate Bob Hines look on during wilderness survival training at the U.S. Navy’s Survival, Evasion, Resistance, and Escape School in Brunswick, Maine. Photo Credit: (NASA/Josh Valcarcel)

jsc2018e049894 (05-18-18) ---(From left) 2017 NASA astronaut candidate Jessica Watkins, Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons, and NASA astronaut candidates Bob Hines and Frank Rubio are instructed on International Space Station tools associated with their spacesuits at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/James Blair)

jsc2018e052153 (May 30, 2018) --- 2017 NASA astronaut candidate Jessica Watkins preps her station with fellow candidate Loral O’Hara looking on during wilderness survival training at the U.S. Navy’s Survival, Evasion, Resistance, and Escape School in Brunswick, Maine. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e111785 (08-23-2017) --- 2017 NASA astronaut candidate Loral O’Hara awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117836 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Zena Cardman (foreground) and Warren Hoburg (background) work alongside divers. Photo Credit: (NASA/David DeHoyos)

jsc2017e118963 (September 21, 2017) --- 2017 Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons is all smiles during helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e111799 (08-23-2017) ---2017 NASA astronaut candidate Zena Cardman awaits next steps by instructors during water survival training at NASA’s Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e111780 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Loral O’Hara is fitted for training gear by instructors. Photo Credit: (NASA/David DeHoyos)

jsc2017e118980 (September 21, 2017) --- 2017 NASA astronaut candidates Kayla Barron (left) and Zena Cardman (right) receive guidance from training instructors during helicopter water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/Josh Valcarcel)

jsc2017e111782 (08-23-2017) --- 2017 NASA astronaut candidate Zena Cardman awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e111750 (08-23-2017) --- 2017 NASA astronaut candidate Kayla Barron awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e111705 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, Texas, NASA astronaut candidate Jonny Kim (right) works alongside instructors. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117884 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Jessica Watkins is guided through training by divers. Photo Credit: (NASA/David DeHoyos)

jsc2017e111697 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidates Warren Hoburg (center) and Jonny Kim (right) work alongside their instructors. (NASA/David DeHoyos)

jsc2017e111798 (08-23-2017) --- 2017 NASA astronaut candidate Zena Cardman awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117812 (08-23-2017) --- 2017 NASA astronaut candidate Jessica Watkins awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e111727 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons (right) is fitted for training gear by instructors. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117879 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Jessica Watkins works alongside divers. Photo Credit: (NASA/David DeHoyos)

jsc2017e111736 (08-23-2017) ---2017 NASA astronaut candidate Warren Hoburg awaits next steps by instructors during water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117804 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Jonny Kim (left) works alongside divers. Photo Credit: (NASA/David DeHoyos)

jsc2017e1117823 (08-23-2017) --- (From left) 2017 Astronaut candidates Jessica Watkins of NASA, Jennifer Sidey-Gibbons of CSA, and Loral O’Hara of NASA give a thumbs up after successful water survival training at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston. Photo Credit: (NASA/David DeHoyos)

jsc2017e111703 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Jonny Kim (right) is fitted for training gear by instructors. (NASA/David DeHoyos)

jsc2017e1117871 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, Canadian Space Agency astronaut candidate Jennifer Sidey-Gibbons is guided through training by divers. Photo Credit: (NASA/David DeHoyos)

jsc2017e111702 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Warren Hoburg (right) works alongside his instructors. Photo Credit: (NASA/David DeHoyos)

jsc2017e111790 (08-23-2017) --- During water survival training in 2017 at NASA Johnson Space Center’s Neutral Buoyancy Laboratory in Houston, NASA astronaut candidate Jessica Watkins (right) works alongside instructors. Photo Credit: (NASA/David DeHoyos)