KABUL — Bombs and bullets killed seven American troops on Monday, the deadliest day for U.S. forces in Afghanistan in nearly a year _ and a sign that the war being fought in the Taliban heartland of the south and east could now be expanding north.
Separately, Taliban militants claimed on a militant Web site that they were holding an American soldier whom the U.S. military says insurgents might have captured last week. The Taliban statement, however, did not include any...
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