Britain's Catherine, Duchess of Cambridge, (L) her husband Prince William, (2nd R) Prince Harry (R) and Lord Dannatt, (2nd L) Constable of the Tower of London, are pictured during a visit to the Tower of London's 'Blood Swept Lands and Seas of Red' poppy installation, in central London, on August 5, 2014. The installation will eventually consist of 800,000 ceramic poppies planted in the dry moat over the summer to create a major art installation. In total, 888,246 ceramic poppies will be planted in the moat, one for each British and Colonial fatality during WWI.  AFP PHOTO / JOHN STILLWELL/POOL        (Photo credit should read JOHN STILLWELL/AFP/Getty Images)