WASHINGTON — During a routine check of a watch tower at a U.S. military base in Kuwait, an Army sergeant found the guard leaning back in a chair, his sunglasses on, apparently sound asleep. When the soldier woke the guard, an employee of a defense contractor named Combat Support Associates, he denied he'd dozed off while on duty. "It's so weird that I can close my eyes for one second and then you appear out of nowhere," the guard said, according to the sergeant's March 2008 inspection report. The episode illustrates the problems between the U.S.