BAGHDAD (AP) — Iraq is falling fall far behind schedule in creating a system to maintain its own military equipment, costing American taxpayers hundreds of millions of dollars to fill in the gaps, according to a new U.S. audit. The report highlights some of the fundamental worries among American commanders as they look past the U.S. military exit from Iraq at the end of 2011: Will Iraqi security forces be able to handle tasks as basic as keeping their vehicles on the road?