President fires marshmallow cannon

Robots, rockets and cannons took over the State Dining Room as President Obama checked out the projects of 100 kids from around the country at the White House Science Fair.

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President Barack Obama pumps air pressure into Extreme Marshmallow Cannon designed by Joey Hudy, left, of Phoenix, Arizona, before firing a marshmallow across the State Dining Room of the White House during the second White House Science Fair in Washington February 7.

KEVIN LAMARQUE / REUTERS

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 . The fair celebrates the achievements of student winners of a broad range of science, technology, engineering and math competitions from across the country.

KEVIN LAMARQUE / REUTERS

President Barack Obamalooks on with kids as a marshmallow is launched in a gun designed by Joey Hudy, left, of Phoenix, Arizona, in the State Dining Room of the White House in Washington. Also watching are Titus Walker, second from left, and Robert Knight, III, both from Monroeville, Ala. Obama hosted the second White House Science Fair celebrating the student winners of a broad range of science, technology, engineering and math competitions from across the country.

Susan Walsh / AP

President Barack Obama talks with Morgan Ard, center, and Titus Walker, left, both eighth-graders 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.

Susan Walsh / AP

President Barack Obama speaks as he hosts the second White House Science Fair celebrating the student winners of a broad range of science, technology, engineering and math competitions from across the country in Washington February 7.

KEVIN LAMARQUE / REUTERS

President Barack Obama talks with Janet Nieto, left, Gwynelle Condino, center, and Ana Nieto, right, all from Presidio, Texas, in the State Dining Room of the White House in Washington for the White House Science Fair. The girls have successfully competed in a number of rocketry challenges and have attended the NASA Student Launch Initiative Advanced Rocketry program. O

Susan Walsh / AP

U.S. President Barack Obama shares a group hug with Team America Rocketry Challenge students from Presidio, Texas, during the second White House Science Fair in Washington February 7, 2012.

KEVIN LAMARQUE / REUTERS

President Barack Obama talks with Jessica D'Esposito, from Petersburg, Indiana, to learn about her team's portable disaster relief shelterin the State Dining Room of the White House in Washington during the White House Science Fair.

Susan Walsh / AP

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President fires marshmallow cannon

Robots, rockets and cannons took over the State Dining Room as President Obama checked out the projects of 100 kids from around the country at the White House Science Fair.

FEATURED PHOTO GALLERIES