"…in the Obama administration, between 1,507 and 2,438 people have been killed in drone strikes. Of those, 148 to 309, or between 10% and 12%, were civilians, according to the New America Foundation data."
source: http://articles.cnn.com/2012-07-13/opinion/opinion_bergen-civilian-casualties_1_drone-strikes-civilian-casualties-separate-strikes

"…in the Obama administration, between 1,507 and 2,438 people have been killed in drone strikes. Of those, 148 to 309, or between 10% and 12%, were civilians, according to the New America Foundation data."

source: http://articles.cnn.com/2012-07-13/opinion/opinion_bergen-civilian-casualties_1_drone-strikes-civilian-casualties-separate-strikes