Brent Dulak doesn't want to go to Afghanistan. Haunted by the memories of his two tours in Iraq and burnt out on soldiering, he wants nothing more than to engage in self-destructive behavior. He's a U.S. Army medic who was recently promoted to sergeant, in charge of a team of soldiers whose job it will be to patch up the wounded at a remote outpost as the Americans prepare to turn Kandahar Province over to the Afghan forces. That won't be easy: Kandahar...