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The Imperial State Crown, the Sword of State and the Cap of Maintenance, the three symbols of sovereign power, travel in a state coach to the Palace of Westminster in central London on May 27, 2015 for the State Opening of Parliament. The State Opening of Parliament marks the formal start of the parliamentary year and the Queen's Speech sets out the governments agenda for the coming session. AFP PHOTO / POOL / NEIL HALL (Photo credit should read NEIL HALL/AFP/Getty Images)

The Imperial State Crown, the Sword of State and the Cap of Maintenance, the three symbols of sovereign power, travel in a state coach to the Palace of Westminster in central London on May 27, 2015 for the State Opening of Parliament. The State Opening of Parliament marks the formal start of the parliamentary year and the Queen's Speech sets out the governments agenda for the coming session.  AFP PHOTO / POOL / NEIL HALL        (Photo credit should read NEIL HALL/AFP/Getty Images)