Afghanistan : Three out of four American casualties are caused by insurgents . A British aid worker was also killed this year by U.S. special forces trying to rescue her from kidnappers . More than 2,400 civilians are killed and more than 3,800 injured this day . The US and its allies are killing fewer , but insurgents are killing more .
Afghanistan : Three out of four American casualties are caused by insurgents . More than 2,400 civilians are killed and more than 3,800 injured this day . The US and its allies are killing fewer , but insurgents are killing more .