The region around Kandahar city in Afghanistan is the Taliban's birthplace and breeding ground. That makes it a key location in the U.S. military's security efforts. But "securing" a region in which you can hardly distinguish friend from foe is far easier said than done. NPR staff photographer David Gilkey just returned from the region, where he spent time with the 101st Airborne Division. Their mission is two-fold: chase out the Taliban and win the trust of locals — if they can.