And now, President Obama playing with a marshmallow cannon

Yesterday, President Obama hosted over 100 students at 1600 Pennsylvania Avenue for the second annual White House Science Fair. Young scientists of all ages showed off projects in subjects ranging from robots, to rocketry, to energy conservation. Fourteen-year-old Joey Hudy even brought an air cannon capable of… »2/08/12 10:45am2/08/12 10:45am