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President Barack Obama walks in the Cross Hall of the White House in Washington, Thursday, Nov. 20, 2014, to award the National Medals of Science and National Medals of Technology and Innovation. The awards are the highest honor bestowed by the USs Government upon scientists, engineers, and inventors. (AP Photo/Pablo Martinez Monsivais)
Photo by: Pablo Martinez Monsivais
President Barack Obama walks in the Cross Hall of the White House in Washington, Thursday, Nov. 20, 2014, to award the National Medals of Science and National Medals of Technology and Innovation. The awards are the highest honor bestowed by the USs Government upon scientists, engineers, and inventors. (AP Photo/Pablo Martinez Monsivais)

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