Outsiders often view SEALs as supermen. Perhaps they are in the sense of infused commitment to both achieving the objective and never quitting. But ordinary, according to insiders, in the sense that they are just highly trained men doing extraordinary things. “Definitely not Supermen, my classmates particularly,” says Worthington. “One guy, however, could hold his breath five minutes. Another was a two-pack-a-day smoker who still survived BUDS. “BUDS, incidentally, is between your ears. Sure, you have to make times on the O-Course [obstacle course], the four-mile run, etc., but the kid who sticks in there, survives. It’s a mindset of...