Sound Of A Gun Salute

The sound of a gun salute tore through central London on Friday to celebrate the 91st birthday of Britain's Queen Elizabeth II, with the world's longest-reigning monarch taking a step back from royal duties to allow the younger generation to step forward.

The sound of a gun salute tore through central London on Friday to celebrate the 91st birthday of Britain's Queen Elizabeth II, with the world's longest-reigning monarch taking a step back from royal duties to allow the younger generation to step forward.