BAGHDAD, Iraq - U.S. and Iraqi troops launched an operation in western Iraq to clear insurgents from a suspected safe area used to make car and roadside bombs, the military said Wednesday. The campaign came as President Bush defended his Iraq policy in a major speech, saying more Iraqi security forces are increasingly taking the lead in battle but that "this will take time and patience." About 1,500 U.S. Marines from the 13th Marine Expeditionary Unit, 500 U.S. soldiers and 500 Iraqi soldiers were taking part in Operation Iron Hammer near Hit, 85 miles west of Baghdad, a U.S. Marine...