WASHINGTON, DC - JULY 01: NASA Administrator Charles Bolden Jr. (L) addresses the National Press Club Newsmakers Luncheon as astronaut and space shuttle commander Capt. Mark Kelly looks on July 1, 2011 in Washington, D.C. With the final space shuttle launch a week away, Bolden gave assurances that the United States would continue to lead in the exploration of space and talked about NASA's plans to extend human presence beyond low-Earth orbit. Kelly also announced that he has no plan to seek elected public office. (Photo by Chip Somodevilla/Getty Images)