NASA astronaut Randy Bresnik, right, shakes hands with Colonel Tyler Zagurski, Commanding Officer, Marine Corps Barracks, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik presents Colonel Tyler Zagurski, Commanding Officer, Marine Corps Barracks, with a montage from his Expedition 53, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik signs photos after speaking to Marines about his time onboard the International Space Station, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli speaks to Marines about his time onboard the International Space Station after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik stands on the center point after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik speaks to Marines about his time onboard the International Space Station after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik poses for a photo with a Marine after speaking to them about his time onboard the International Space Station, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik speaks to a Marine about his time onboard the International Space Station after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik speaks to Marines about his time onboard the International Space Station after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and ESA astronaut Paolo Nespoli, left, speak to Marines about their time onboard the International Space Station after touring the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and his wife Rebecca tour the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, pose for a photo outside the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik and wife Rebecca tour the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik signs the guest book before touring the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli sits on a couch where Archibald Henderson, the 5th Commandant of the Marine Corps passed away in 1859, during a tour of the Home of the Commandants, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and his wife Rebecca tour the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik thanks Marines for the tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, center, wife Rebecca, right, and ESA astronaut Paolo Nespoli tour the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)