President Barack Obama stands with Dr. Sallie Chisholm of the Massachusetts Institute of Technology after he awarded her the National Medal of Science during a ceremony in the East Room of the White House in Washington, Friday, Feb. 1, 2013. The awards are the highest honors bestowed by the United States Government upon scientists, engineers, and inventors. (AP Photo/Charles Dharapak)
Barack Obama, Sallie Chisholm
President Barack Obama stands with Dr. Sallie Chisholm of the Massachusetts Institute of Technology after he awarded her the National Medal of Science during a ceremony in the East Room of the White House in Washington, Friday, Feb. 1, 2013. The awards are the highest honors bestowed by the United States Government upon scientists, engineers, and inventors. (AP Photo/Charles Dharapak)
