All I know is that when you fly in fear, the sky, the air, and the distance below is immense and hostile. In the presence of air, the earth and your stomach fall away, leaving your heart racing. I sometimes think of the fear passengers felt as a plane went down—but this is not something to dwell on. Dwelling is long, painful, lingering. For most, a crash is only seconds in the making. Maybe the catastrophe is so brief, there is no time even for fear. One hopes this is the circumstance for those who are trapped in the moment of final disaster, like this most recent one, Metrojet Flight 9268 that crashed in the Sinai.