Some of the most serious violations include: Employees sleeping on the job, letting family and friends go without being screened, leaving work without permission, and stealing. The Government Accountability Office report released this week says more than 9,000 cases of misconduct were documented over a three-year span. More than 1,900 of the incidents were deemed significant enough to be possible security threats. "There's not even a way to properly report some of the offenses, so this may be just the tip of the iceberg of some of the offenses," said Rep. John Mica, a longtime critic of the TSA who...