NASA Special Assistant Mr. Christopher Shank, left, and NASA Administrator Michael Griffin talk during a hearing before the House Science Committee, Tuesday, June 28, 2005, Rayburn House Office building, Washington. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Michael Griffin, left, meets with CEO of SpaceX Elon Musk, right, Wednesday, April 20, 2005 at NASA Headquarters in Washington. Looking on in the background are Larry Williams, NASA astronaut Marsha Ivins and NASA manager Christopher Shank. Photo Credit: (NASA/Renee Bouchard)