What Is A 'Green-On-Blue' Attack? Killing Of US Major General Harold Greene Is Just Third Insider Attack In 2014

The killing Tuesday of a U.S. major general, believed to be at the hands of an Afghan soldier, marks the third instance of so-called "green-on-blue" attacks in Afghanistan in 2014. Such insider attacks have seen a sharp decline since the 44 committed in 2012, which accounted for 15 percent of all coalition deaths in Afghanistan that year.