Mahmoud Ahmadinejad beware! Barack Obama learns to fire a new weapon.
The president of the United States President tested a new high-powered prototype Tuesday for his commander-in-chief's arsenal -- a high-powered gun that sent a sugary missile screaming through the White House!
The weapon was a marshmallow gun invented by 14-year-old Joey Hudy shown above with the cannon.
The gun, called "Extreme Marshmallow Cannon," was part of the White House Youth Science Fair.