Students listen as NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik's wife Rebecca and her friend Shiela present the Washington School for Girls a necklace that was flown in space onboard the International Space Station, Friday, May 11, 2018 at the Washington School for Girls in Washington. The necklace is a graduation gift for each student when they complete 8th grade. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and ESA astronaut Paolo Nespoli, left, speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik speaks about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Students listen as NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik speaks about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

A student raises her hand to ask a question after NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli spoke about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and his friend Shiela, center, present the principle of the school Dr. Beth Reaves, with a montage of images and items from Expedition 53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli gives a patch to a teacher for Teacher Appreciation Week after speaking about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli speaks about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Students listen as NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)