Jocko lost four of his closest friends in combat. He was overseas leading his SEAL unit. And he found a way to bounce back. That’s not easy. So I wanted to know how he did it. So I can practice, too. “I’ll tell you exactly what I did,” he said. And he started to tell me about his “warrior code.” This is what he teaches other veterans. And he writes about it in his books, too. Jocko’s the author of “Marc’s Mission: The Way of the Warrior Kid.” It’s a children’s book.