Britain's Prince William, Duke of Cambridge, lays flowers at the 7/7 memorial in London's Hyde Park on July 7, 2015, in memory of the 52 people killed during the 7/7 London bombings of 2005. Britain today marked 10 years since the London bombings with a minute's silence for the 52 victims, less than a fortnight after an attack in Tunisia highlighted the ongoing Islamist threat.   AFP PHOTO / JACK TAYLOR        (Photo credit should read JACK TAYLOR/AFP/Getty Images)