A search and rescue team helps NASA astronaut Christina Koch out of the Soyuz MS-13 space capsule carrying her and International Space Station (ISS) crew members Luca Parmitano and Alexander Skvortsov, after landing in Zhezkazgan, Kazakhstan, February 6, 2020. U.S. astronaut Christina Koch, who led the first all-female spacewalk in 2019, was due to return to Earth on Thursday after a record stay aboard the International Space Station, capping a busy mission that could yield key insights into deep-space travel. Sergei Ilnitsky/Pool via REUTERS

NASA astronaut Christina Koch is helped out of the Soyuz MS-13 spacecraft just minutes after she, Roscosmos cosmonaut Alexander Skvortsov, and ESA astronaut Luca Parmitano, landed in a remote area southeast of Zhezkazgan in the Karaganda region of Kazakhstan, February 6, 2020. Koch, 41, was scheduled to climb into a Russian Soyuz capsule docked at the station with two other returning crew members and depart at 9:30 p.m. EST on Wednesday (0230 GMT on Thursday) after logging 328 days on the orbiting laboratory. NASA/Bill Ingalls via REUTERS.

NASA astronaut Christina Koch reacts shortly after landing of the Russian Soyuz MS-13 space capsule in a remote area southeast of Zhezkazgan in the Karaganda region of Kazakhstan, February 6, 2020. Koch's mission broke the record for the longest continuous stay in space by a woman, previously held by NASA's Peggy Whitson. Sergei Ilnitsky/Pool via REUTERS

NASA astronaut Christina Koch is helped out of the Soyuz MS-13 spacecraft just minutes after she, Roscosmos cosmonaut Alexander Skvortsov, and ESA astronaut Luca Parmitano, landed their Soyuz MS-13 capsule in a remote area southeast of Zhezkazgan in the Karaganda region of Kazakhstan, February 6, 2020. NASA/Bill Ingalls via REUTERS.

NASA astronaut Christina Koch gets assistance shortly after landing of the Russian Soyuz MS-13 space capsule in a remote area southeast of Zhezkazgan in the Karaganda region of Kazakhstan, February 6, 2020. Sergei Ilnitsky/Pool via REUTERS

NASA astronaut Christina Koch sits in a chair shortly after landing of the Russian Soyuz MS-13 space capsule in a remote area southeast of Zhezkazgan in the Karaganda region of Kazakhstan, February 6, 2020. Sergei Ilnitsky/Pool via REUTERS