The Joint Chiefs changes the guard

Friday - 9/30/2011, 11:32pm EDT

There's a new top military leader at the Pentagon, Army General Martin Dempsey. President Obama called Dempsey one of the military's most battle-tested officers. Defense Secretary Leon Panetta said Dempsey knows about people, "he knows about hard work, he knows about sacrifice." Dempsey said at his swearing in, "We'll change and we'll be challenged," He also said when his turn is up, he intends to be able to say the military is still strong.