Yesterday: Seven U.S. troops were killed in Afghanistan on Tuesday - five in a massive Taliban suicide bombing in Kabul that filled the streets of the capital with blood. The attack brought the U.S. toll to a grim new milestone - 1,000 American soldiers dead in Afghanistan since the war began in 2001, the independent Web site icasualties.org. reported. The fighting continued into today as insurgents launched a predawn assault against the U.S.-run Bagram Air Field. Seven militants had been killed during the "ongoing attack" on Bagram, which included rockets, small arms and grenades, a U.S. statement said. Five service...