President Barack H. Obama, Brig. Gen. Karl Horst, and others stand on the plaza of the Tomb of the Unknown Soldier at Arlington National Cemetery on Veteran's Day. The president and thousands of other Americans were at Arlington National Cemetery t...

Brig. Gen. Karl Horst, commander of the Military District of Washington, salutes the American flag before President Obama's speech at the ampitheater in Arlington National Cemetery. Obama spoke to visitors of the cemetery about his commitment to Ame...