Yesterday was the 90th birthday of the Royal Air Force. Part of the celebrations was a flypast by the Red Arrows in their Hawks and four spanky-new Typhoons (the RAF's name for the Eurofighter). I stood on London Bridge with dozens of others, squinting in the direction of Tower Bridge. At a shade before 1pm (so they'd pass parliament and the RAF memorial on the hour) they shot overhead, releasing their trademark red white and blue smoke directly over Tower Bridge. They were two thousand feet up and moved together as one.
Here's a film captured from youtube - it's a rare recording of a Lancaster over Hamburg (maybe in 1943). The voice recordings are especially haunting. Happy Birthday, RAF.