US: Afghan Civilian Deaths 'Unfortunate'

ROME -- The U.S. ambassador to the United Nations said Monday it was "unfortunate" that civilians have been caught up in the NATO-led military operation in Afghanistan, calling war an imperfect science. --- Ambassador Zalmay Khalilzad spoke to reporters in Rome, where he was attending a two-day conference to map out a strategy for strengthening Afghanistan's police, legal and justice systems.