WASHINGTON (AP) - New regulations requiring that airline passengers remain seated until 30 minutes after takeoff from Reagan National Airport led to an embarrassing incident for a Georgia congressman. Unable to wait in a long bathroom line when passengers were finally allowed to move freely, Rep. Sanford Bishop ( news, bio, voting record) contends he had no choice but to ask a flight attendant for a plastic cup and some privacy. "The bottom line is he desperately needed to go to the bathroom," Bishop's spokesman, Selby McCash, explained Friday. "There was someone in there taking a very extended time. He...