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WASHINGTON - FEBRUARY 6: In this handout provided by NASA, NASA Administrator Michael Griffin (L) outlines US President George W. Bush's budget for Fiscal Year 2007 at a news conference February 6, 2006 at NASA Headquarters in Washington, DC. The administrator was joined by the heads of NASA's four mission directorates to explain how the proposed $16.8 billion dollar budget supports the Vision for Space Exploration. The budget represents a 3.2% increase above the Fiscal Year 2006 appropriated budget. Seated left to right: Scott J. Horowitz, NASA Associate Administrator, Exploration Systems, William Gerstenmaier, NASA Associate Administrator, Space Operations, Lisa J. Porter, NASA Associate Administrator, Aeronautics Research and Mary Cleave, NASA Associate Administrator, Science. (Photo by Bill Ingalls/NASA via Getty Images)