How they do the pre-game flypast

It's one of the iconic moments in the build-up to any major sporting event. As the final note of the national anthem rings out, a close formation of aircraft swoops low over the stadium, flashing across the open sky in a split second.

You'd have to have a heart of stone not to be moved by the theatre and drama of it - it certainly gets me every time.

This video on NFL Films shows you how it's done to such split-second timing and such emotional effect.