"Mr. Gates and American military commanders have made no secret of their view that some of the 47,000 American troops in Iraq should remain after 2011 as a stability force, particularly as tensions have flared between Arabs and Kurds in the north. But Mr. Gates said that the Iraqi government must first request that the American troops stay. That has not happened yet, much to the growing impatience of American commanders who say they need to know now in order to plan into 2012. “We are willing to have a presence beyond that time,” Mr. Gates told the soldiers at Camp Liberty...The top American commander in Iraq, Gen. Lloyd J. Austin III, made clear on Thursday that Iraq was not ready to defend itself, particularly from the skies. He said the Iraqis also needed help with intelligence gathering, logistics and the use of different weapons systems in coherent warfare."