The Royal Air Force Bomber Command Memorial is a memorial in Green Park, London, commemorating the crews of RAF Bomber Command who embarked on missions during the Second World War. The memorial, located on Piccadilly near Hyde Park Corner, was built to mark the sacrifice of 55,573 aircrew from Britain, Canada, Czechoslovakia, Poland and other countries of the Commonwealth, as well as civilians of all nations killed during raids. Queen Elizabeth II unveiled the memorial on 28 June 2012, the year of her Diamond Jubilee.