WASHINGTON, Aug. 17, 2007 – The clock is ticking for American troop presence in Iraq, and if more time is needed, it will require more progress in the region, the commander of coalition troops there said today. "If the Iraqi security forces, the Iraqi people, the Iraqi political leaders can demonstrate that there should be hope for them making the most of the opportunity, that our soldiers, sailors, airmen and Marines are fighting to provide them, indeed there could be time put on the clock, kept on the clock to enable this endeavor to go forward,” Army Gen. David H....