U.S. President Barack Obama, accompanied by Congressman C.A. "Dutch" Ruppersberger D-MD and middle school children, prepares to hand over the phone to a student to ask a question to astronauts on the International Space Station during an event in the Roosevelt Room of the White House, Wednesday, Feb. 17, 2010 in Washington. Image credit: NASA/Bill Ingalls Feb. 17, 2010 NASA Identifier: 427928main_fd11-1