NEW : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty. The drop comes ahead of President Obama 's August 31 deadline . U.S. troops will now switch to an advice-and-assist role . Vice President Biden says Iraqi security forces are now successfully protecting Iraq .
NEW : U.S. troop withdrawal rates will depend on ground conditions , Brennan says . The drop comes ahead of President Obama 's August 31 deadline . U.S. troops will now switch to an advice-and-assist role . Vice President Biden says Iraqi security forces are now successfully protecting Iraq .