It's 7,800 tons, 337 feet and $2 billion worth of steel and stealth, with war-fighting controls that look like a big arcade video game. That new-boat smell may have worn off a bit during sea trials, but the man in charge was pumped with pride as the U.S. Navy's newest submarine joined the fleet in a commissioning ceremony at Norfolk Naval Station on Saturday. The shiniest and coolest thing I've ever seen in my military career," Cmdr. Daniel Caldwell, a 22-year Navy veteran and the first captain of the USS John Warner, told CNN. "It's going to make whatever I...