Parade marks Queen Elizabeth II's birthday

Britain's Queen Elizabeth II, centre in carriage, arrives at Horse Guards Parade, to attend the Trooping the Colour parade, in London, Saturday, June 15, 2013. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance but without her husband by her side. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony. (AP Photo/Anthony Devlin, PA) UNITED KINGDOM OUT

Foot Guards march to the Horse Guards Parade, as part of the Trooping the Colour parade, in London, Saturday, June 15, 2013. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance but without her husband by her side. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony. (AP Photo/Sang Tan)

Foot Guards march to the Horse Guards Parade, as part of the Trooping the Colour parade, in London, Saturday, June 15, 2013. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance but without her husband by her side. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony. (AP Photo/Sang Tan)

Britain's Queen Elizabeth II as the Guards march past outside Buckingham Palace after the Trooping The Colour, at the Horse Guards Parade in London, Saturday, June 15, 2013. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance but without her husband by her side. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony. (AP Photo/Sang Tan)

Britain's Queen Elizabeth II leaves Buckingham Palace in a horse drawn carriage for the Trooping The Colour parade, at the Horse Guards Parade in London, Saturday, June 15, 2013. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance but without her husband by her side. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony (AP Photo/Sang Tan)