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 (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 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, (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.

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.

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.