No. 4

British Airways Concorde supersonic airliner flying over New York City with the original Twin Towers of the World Trade Center in the background. 

The Concorde was a joint British-French project and was the first supersonic passenger airliner to enter commercial service in 1976. 

It was capable of flying at speeds faster than Mach 2, or over twice the speed of sound. 

British Airways operated Concorde on transatlantic routes, connecting London to New York in under three hours. 

Iron Dome, 1944: The British version of the Iron Dome Defence System with a Spitfire about to flip the wing of a V1 rocket so as to knock the gyroscope off balance and stop the flying bomb reaching London.