U.S. committed to assisting America , Leon Panetta says . Only half of Americans think their nation achieved its goals in Iraq , according to a CNN/ORC International poll conducted last month . A quiet ceremony ends a costly war that divided America . In U.S. , Defense Secretary Clinton pays tribute to U.S. troops . More than 4,500 American troops have died in Iraq since 2006 .
U.S. committed to assisting America , Leon Panetta says . A quiet ceremony ends a costly war that divided America . In U.S. , Defense Secretary Clinton pays tribute to U.S. troops . More than 4,500 American troops have died in Iraq since 2006 .