The Taliban have battled U.S. and NATO troops , as well as Afghan government forces , since the 2001 invasion after the September 11 attacks on New York and Washington . Security cameras show the suspect leaving and returning alone , officials say . `` The killing of innocent civilians is outrageous , '' Obama says . Score: 6 The Taliban say the deaths will be avenged by `` beheading '' Americans .
Security cameras show the suspect leaving and returning alone , officials say . `` The killing of innocent civilians is outrageous , '' Obama says . Score: 6 The Taliban say the deaths will be avenged by `` beheading '' Americans .