Since the United States entered World War II, the Department of Defense has engaged in the systematic surveillance of other nations by air to glean valuable intelligence on weapons capabilities and military movements. These missions are quite dangerous and often ended in disaster, but the risks endured by these aircrews aboard the Pentagon's beloved spy planes are often overlooked due to the sensitive nature of their assignments.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.