NEW : U.S. 's prime minister says he wants good relations with U.S. . The incident exacerbated already strained relations with Pakistan . `` Such attacks ... demonstrate complete disregard for international law and human life , '' Pakistani Foreign Minister Hina Rabbani Khar said the day after the attack . The U.S. is vacating the Shamsi Air Base , which is used by unmanned combat vehicles . The impact of vacating the air base is likely to be minimal , experts say . Pakistan told the the United States to leave the base after an airstrike killed one Pakistani troops .
NEW : U.S. 's prime minister says he wants good relations with U.S. . The U.S. is vacating the Shamsi Air Base , which is used by unmanned combat vehicles . The impact of vacating the air base is likely to be minimal , experts say . Pakistan told the the United States to leave the base after an airstrike killed one Pakistani troops .