Tim Craig Antonio Olivo Missy Ryan The Washington Post

The U.S. drone strike thought to have killed Taliban chief Akhtar Mohammad Mansour represents another escalation in U.S. involvement in the war in Afghanistan by trying to cripple an insurgent group that has for years found refuge on Pakistani soil.

The U.S. drone strike thought to have killed Taliban chief Akhtar Mohammad Mansour represents another escalation in U.S. involvement in the war in Afghanistan by trying to cripple an insurgent group that has for years found refuge on Pakistani soil.