CAMP ISKANDARIYAH, Iraq – The lucky soldiers live in air-conditioned "cans" surrounded by concrete blast walls. The less fortunate get hot, moldy tents. They drink rivers of Red Bull and Mountain Dew. On Sunday nights they might eat steak and crab legs. For entertainment, they can buy bootleg DVDs of The Dukes of Hazzard for only $3. Inside the gate, absent the occasional mortar attack, soldiers are relatively safe. But they never go "outside the wire" unless fully armed. Such is life in the American military's forward operating bases, which represent a new approach to war.