FILE – In this Tuesday, Feb. 24, 2015, file photo, Buzz Aldrin, former NASA Astronaut and Apollo 11 Pilot, prepares to testify on Capitol Hill in Washington, before the Senate subcommittee on Space, Science, and Competitiveness hearing on human exploration goals and commercial space competitiveness. Officials said Aldrin, one of the first men to walk on the moon, has been evacuated by plane from the South Pole for medical reasons. An association of Antarctica tour operators said Thursday, Dec. 1, 2016, that Aldrin was visiting the South Pole as part of a private tourist group when his health deteriorated. (AP Photo/Susan Walsh, File)