Just how do they time those pregame flyovers so perfectly? For military pilots, it's no big deal

As soon as the final notes come to a close on those pregame flyovers, a jet, chopper or other big military plane will appear over a stadium perfectly on cue. How do they do it? How do planes flying sometimes hundreds or thousands of miles appear overhead just as soon as "... and the home of the brave" is sung? For pilots trained to be over a target at a specific time, it's really no big deal. My story for ESPN.com's Playbook: http://espn.go.com/blog/playbook/fandom/post/_/id/6544/how-flyovers-hit-their-exact-marks-at-games