Musicians of the Royal Marines parade along The Mall after performing in the largest "Beating Retreat" military pageant in front of Britain's Prince Philip, which is also attended by Queen Elizabeth, at the Horse Guards Parade in London June 4, 2014. A total of 490 military personnel and musicians performed in the annual "Beating Retreat" this year to celebrate the 350th anniversary of the Royal Marines. REUTERS/Luke MacGregor (BRITAIN - Tags: MILITARY ROYALS ANNIVERSARY)