"On previous flight ops, when a launch was delayed, we usually passed the time telling jokes or exchanging the latest scuttlebutt. Tonight was different. Each of us sat silently with our own thoughts. All of us, I'm sure, made impossible promises to God, and I was one of them. My gut was wound so tight, it was hard to breathe, no less talk. For the umpteenth time, I tightened the harness of my chute. I remember praying, 'Whatever else happens, don't...