The U.S. military is weighing new directions for Iraq, including an even bigger troop buildup if U.S. President George W. Bush thinks his «surge» strategy needs a further boost, the chairman of the Joint Chiefs of Staff said Monday. Marine Gen. Peter Pace revealed that he and the chiefs of the Army, Marine Corps, Navy and Air Force are developing their own assessment of the situation in Iraq, to be presented to Bush in September. That will be separate from the highly anticipated report to Congress that month by Gen. David Petraeus, the top commander for Iraq. The Joint Chiefs are considering a range of actions, including another troop buildup, Pace said without making any predictions. He called it prudent planning to enable the services to be ready for Bush's decision. The military must «be prepared for whatever it's going to look like two months from now,» Pace said in an interview with two reporters traveling with him to Iraq from Washington. «That way, if we need to plus up or come down» in numbers of troops in Iraq, the details will have been studied" he said in an interview with the Associated Press. Pace, on his first visit since U.S. commanders accelerated combat operations in mid-June, said another option under consideration is maintaining current troop levels beyond September. There are now about 158,000 U.S. troops in Iraq, reflecting a boost of about 30,000 to carry out the new strategy Bush announced in January.