Abdul Samad, center, 11 of whose family members were killed by a U.S. soldier on Sunday in Panjwai in Kandahar province, is seen after a meeting with Afghan President Hamid Karzai at the presidential palace in Kabul, Afghanistan, on Friday. Afghan President Hamid Karzai lashed out at the United States on Friday, saying he is at the "the end of the rope" because of the lack of U.S. cooperation into a probe of a killing spree allegedly carried out by an American soldier.