Retired Navy Captain and commander of Apollo 17 Eugene Cernan, center, is flanked by Apollo 11 Commander Neil Armstrong, left, and A. Thomas Young, as he testifies during a hearing before the House Science and Technology Committee, Tuesday, May 26, 2010, at the Rayburn House office building on Capitol Hill in Washington. The hearing was to review proposed human spaceflight plan by NASA. Photo Credit: (NASA/Paul E. Alers)