Britain's Queen Elizabeth Marks 60 Years on Throne
Britain's Queen Elizabeth marks a major milestone Monday, kicking off diamond jubilee festivities celebrating her 60 years on the throne.

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Queen Elizabeth and the Duke of Edinburgh enter Parliament House, Wellington, New Zealand, January 12, 1954. The Queen wears her coronation gown, the order of the garter, and a diamond tiara. (AP)

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A new portrait of Britain's Queen Elizabeth by artist Darren Baker is seen after being unveiled at Church House, in London September 20, 2011. (REUTERS)

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Britain's Queen Elizabeth and Prince Philip wave as they board a plane to depart Australia after an 11-day visit, in Perth October 29, 2011. (REUTERS)

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Queen Elizabeth receives a bouquet of flowers from Martha Campbell following a service at Westminster Abbey in London November 16, 2011. (REUTERS)