At 10:25 on Easter morning in 2010 I held up my hand to shield the sun as I searched for the traffic at my two o’clock, 1,000 feet above. The air was smooth at 11,500 feet, above solid clouds and the rugged Washington Cascade mountains below. My family—parents, wife, kids, spouses, grandchildren—had gathered for the holiday that weekend, and now I was getting everyone home.