Britain's Queen Elizabeth and Prince Philip walk through a field of ceramic poppies that form part of the art installation "Blood Swept Lands and Seas of Red", at the Tower of London in London October 16, 2014. The evolving art installation, which will be completed on November 11, will create a commemoration for the centenary of World War One. REUTERS/Luke MacGregor (BRITAIN - Tags: ENTERTAINMENT ROYALS SOCIETY TPX IMAGES OF THE DAY)