 On 14 July 2009, Daniel L. Byman of the Brookings Institution stated that although accurate data on the results of drone strikes is difficult to obtain, it seemed that ten civilians had died in the drone attacks for every militant killed.Byman argues that civilian killings constitute a humanitarian tragedy and create dangerous political problems, including damage to the legitimacy of the Pakistani government and alienation of the Pakistani populace from America.He suggested that the real answer to halting al-Qaeda's activity in Pakistan will be long-term support of Pakistan's counterinsurgency efforts.