 United States officials claim that interviews with locals do not provide accurate numbers of civilian casualties because relatives or acquaintances of the dead refuse to state that the victims were involved in militant activities.The CIA reportedly passed up three chances to kill militant leaders, including Sirajuddin Haqqani, with drone missiles in 2010 because civilians were nearby.The New America Foundation believes that between zero and 18 civilians have been killed in drone strikes since 23 August 2010 and that overall civilian casualties have decreased from 25% of the total in prior years to an estimated of 6% in 2010.