Michael Tuohey sobbed with grief after the Sept. 11, 2001, terrorist attacks. He also felt guilt. A U.S. Airways ticket agent at the time, Tuohey had handed boarding passes to Mohamed Atta and Abdul Aziz Alomari that morning as they rushed to make their flight at Portland International Jetport. In the days after Atta and his fellow suicide hijackers killed close to 3,000 people at the World Trade Center, Tuohey held himself at least partly responsible. He was suspicious of them, he said, but did nothing. Later, as he watched news reports of the towers crumbling, of people jumping from...
