PHOENIX — The diamond formation features four F-16 fighter jets, 18 inches apart, flying at the speed of sound. It takes skill, timing and focus to pull it off.  Watching it live is awe inspiring. From the ground, the sound chasing the jets through the sky is beautiful.  Inside the cockpit, though, is terrifying.  Execution requires synchronization and confidence, a reliance on each member carrying out their task meticulously. Pilots need to believe their colleagues won’t falter.  “If you don’t