Queen Elizabeth II meets well wishers during a walkabout close to Windsor Castle as she celebrates her 90th birthday, in Berkshire, England.
A rowing team passes the Memorial Bridge during practice on the Potomac River early in the morning in Washington.
Pakistani policeman stand guard as a health worker administers polio drops to a child during a polio vaccination campaign after a day after gunmen staged an attack in Karachi.
The King's Troop Royal Horse Artillery fire a 41-gun Royal Salute in Hyde Park, in London. The salute marks the 90's birthday of Britain's Queen Elizabeth II.