John Sopko is fighting corruption in Afghanistan, and making noise while he's at it

"I still get upset about this," says John Sopko, a normally good-natured government investigator now simmering with indignation in his Crystal City office. "You're talking 600 million dollars." His meaty hands clasp a model of an Italian-made military aircraft, known as the G222, that the United States bought for the Afghan air force. "It's notorious. It falls apart," he says, jostling the replica.