In this still image taken from a July 6, 2024, NASA TV broadcast, NASA astronaut and deputy director, Flight Operations Kjell Lindgren (C) speaks as volunteer crew members (L-R) Kelly Haston, Ross Brockwell, Nathan Jones and Anca Selariu, exit the first simulated yearlong Mars habitat mission at Johnson Space Center in Houston, Texas. The crew's mission began in the 3D printed Mars habitat on June 25, 2023. (Photo by Jose ROMERO / NASA TV / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / NASA TV" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS (Photo by JOSE ROMERO/NASA TV/AFP via Getty Images)