Astronaut Ricky Arnold at Six Flags America

NASA astronaut Ricky Arnold reacts as Marty Kelsey from Smithsonian National Air and Space Museum's production, Stem in 30, makes large bubbles behind him, while he speaks about his time onboard the International Space Station (ISS), Friday, May 3, 2019 at Six Flags America theme park in Upper Marlboro, MD. During Expedition 55/56, Arnold completed three spacewalks for a total of 19.5 hours outside the space station, and concluded his 197 day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in Oct. 2018. He also flew to the space station on shuttle mission STS-119 to deliver the final pair of power-generating solar array wings. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Ricky Arnold reacts as Marty Kelsey from Smithsonian National Air and Space Museum's production, Stem in 30, makes large bubbles behind him, while he speaks about his time onboard the International Space Station (ISS), Friday, May 3, 2019 at Six Flags America theme park in Upper Marlboro, MD. During Expedition 55/56, Arnold completed three spacewalks for a total of 19.5 hours outside the space station, and concluded his 197 day mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in Oct. 2018. He also flew to the space station on shuttle mission STS-119 to deliver the final pair of power-generating solar array wings. Photo Credit: (NASA/Aubrey Gemignani)

AstronautExpedition 55 postflightMDMarty KelseyRicky ArnoldSix Flags AmericaSmithsonian National Air and Space Museum NASM Stem in 30USAUpper Marlboro