Miami_rick has captured this spectacular video of these two converging jets. A Southwest Airlines 737 passing overhead his Boeing 767. Closure speed is 1200mph and only 1000ft separates the two jets thanks to the wonders of reduced vertical separation minima with both planes on autopilot. The reduced separation has enabled an increase in traffic in the many busy corridors around the world. https://twitter.com/i/status/1375255513177317376