GARDEZ, Afghanistan (AP) Fierce fighting raged for a fifth day as the United States deployed hundreds of reinforcements Wednesday and gathered 5,000 Afghan troops for an offensive aimed at finishing off al-Qaida. The U.S.-led coalition mounted punishing, round-the-clock airstrikes above the rugged terrain in eastern Afghanistan and some U.S. officers predicted the operation could be wrapped up in days. In Kabul, five peacekeepers