ORLANDO, Florida (Reuters) - A married U.S. astronaut was accused of attempted murder and trying to kidnap a rival for another astronaut's affections on Tuesday, and held in jail. U.S. Navy Capt. Lisa Nowak, who flew on the space shuttle Discovery last July, drove 950 miles from Houston to Orlando -- wearing diapers so she wouldn't have to stop to urinate -- to assault a woman she considered competition for the affections of a male astronaut, police said.