NASA astronaut Shane Kimbrough poses for a photo with a an audience member after giving a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough speaks about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

Audience members watch a live broadcast of Expedition 53 crew launching on the Soyuz rocket to the International Space Station during a presentation by Expedition 49/50 NASA astronaut Shane Kimbrough, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

An audience member wearing a spacesuit joins NASA astronaut Shane Kimbrough onstage for a photo during a presentation about Kimbrough's time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough gives Nikola a fist bump after a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough speaks about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough presents a montage of photos and the Expedition 50 patch to the Arlington Tech High School who hosted his presentation on his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough speaks about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough speaks to an audience member after giving a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough speaks to an audience member after giving a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

A young audience member examines the photo of NASA astronaut Shane Kimbrough during a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

Audience members raise their hands to ask NASA astronaut Shane Kimbrough a question about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Shane Kimbrough calls on an audience member who has a question during a presentation about his time onboard the International Space Station (ISS) during Expeditions 49/50, Tuesday, September 12, 2017 at Arlington Career Center in Arlington, Virginia. During Expedition 50, Kimbrough completed four spacewalks for a total of 39 hours outside the ISS, and concluded his 173-day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in April 2017. Photo Credit: (NASA/Aubrey Gemignani)