Obama hosts White House Science Fair
2012-02-08 05:34:16 GMT2012-02-08 13:34:16(Beijing Time)
SINA.com
President Barack Obama pumps up a gun designed by Joey Hudy, left, of Phoenix, Ariz., left, to shoot a marshmallow in the State Dining Room of the White House in Washington, Tuesday, Feb. 7, 2012, during the White House Science Fair. (AP Photo/Susan Walsh)
U.S. President Barack Obama reacts as Joey Hudy of Phoenix, Arizona, launches a marshmallow from his Extreme Marshmallow Cannon in the State Dining Room of the White House during the second White House Science Fair in Washington February 7, 2012. (REUTERS/Kevin Lamarque)
President Barack Obama talks with, from left, Janet Nieto, Gwynelle Condino, and Ana Nieto, all from Presidio, Texas, Tuesday, Feb. 7, 2012, in the State Dining Room of the White House in Washington during the White House Science Fair. (AP Photo/Susan Walsh)
U.S. President Barack Obama (L) gives a group hug to Team America Rocketry Challenge (TARC), of Presidio, Texas, while touring student science fair projects on exhibit in the State Dining Room at the White House February 7, 2012 in Washington, DC. (Photo by Molly Riley-Pool/Getty Images)
President Barack Obama talks with Morgan Ard, center, and Titus Walker, left, both 8th grade students at Monroeville Jr. High School in Monroeville, Alabama as they how their robot picks up an stuffed eagle in the State Dining Room of the White House in Washington, Tuesday, Feb. 7, 2012, for the White House Science Fair. (AP Photo/Susan Walsh)
Obama hosted the second White House Science Fair celebrating the student winners of a broad range of science, technology, engineering and math (STEM) competitions from across the country.
