Gunmen armed with a rocket launcher torched 29 more NATO oil tankers in southwestern Pakistan before dawn Saturday. It's the latest attack on the supply line for international troops in Afghanistan since Pakistani authorities closed a key border crossing in Torkham after a NATO helicopter strike killed two Pakistani border guards. Since then, there have been several attacks on supply convoys, including two in which militants torched 70 fuel tankers and killed a driver. The Pakistani Taliban have claimed responsibility for such previous attacks.