WASHINGTON, DC – FEBRUARY 07: (AFP OUT) U.S. President Barack Obama (R) greets Jayla Mae Dogan, Ashley Cassie Thomas, and Lucas Cain Beal, all 13, of Detroit, Michigan, who are part of a team who focused on designing a city around the theme of “Fuel Your Future: Imagine New Ways to Meet Our Energy Needs and Maintain a Healthy Planet,” while touring student science fair projects on exhibit in the State Dining Room at the White House February 7, 2012 in Washington, DC. Obama hosted the second White House Science Fair celebrating the student winners of science, technology, engineering and math (STEM) competitions from across the country. (Photo by Molly Riley-Pool/Getty Images)