This file photo shows army troopers taking position in the mountains of Shawal along the Pakistan and Afghanistan border, in 2006. A US drone attack on a militant compound in the same area on Sunday ... more 

This file photo shows army troopers taking position in the mountains of Shawal along the Pakistan and Afghanistan border, in 2006. A US drone attack on a militant compound in the same area on Sunday killed six insurgents, according to security officials less