SHIKARPUR, Pakistan — Suspected militants in southern Pakistan set ablaze at least 27 tankers carrying fuel for U.S. and NATO troops in Afghanistan on Friday, police said.The attack followed the Pakistani government's decision to shut a vital border crossing in apparent protest of a NATO incursion that killed three of its soldiers, and further underscored the risks posed to Western forces who rely heavily on land routes in Pakistan to supply their troops.Read More... More on Pakistan