U.S. drone strikes killed 3,520 people since 2002, including 457 civilians, according to a report released Tuesday by the Council on Foreign Relations. Eleven percent of those killed were civilians. The drone strikes were deadliest in Pakistan, where 3,091 people were killed since 2004, with a whopping 22 percent of deaths being civilians. The deadlines year in Pakistan was 2010, but 2012 was the bloodiest year in Yemen.
