I'm a cargo pilot. In the industry, I'm known as a "Freight Dog." I fly canceled checks and other types of high-value cargo around the country, mostly at night, in airplanes that are older than I am. Flying freight-or "work" as we call it-in small, twin-engine aircraft is a lesser known side of the aviation world. Our day starts when banker's hours end. Thousands of flights move millions of pounds of work from city to city every night while the rest of the country is asleep. We're out there in the freezing rain getting de-iced when you're laying down for bed. We're sweeping the snow off our...