It seemed like just plain bad luck. On September 11, 2001, Jeremy Glick boarded United Flight 93 only because a fire at Newark Airport had prevented him from flying out the day before. That morning, he called his wife, Lyz, to tell her the plane had been hijacked and that he and a group of others were going to storm the cockpit, an effort that doomed Glick and his fellow passengers yet doubtless saved lives on the ground and instantly became known...