LONDON, ENGLAND - MAY 26:  A group of people gather to chant and lay floral tributes outside the Royal Artillery Barracks, close to where Drummer Lee Rigby of the 2nd Battalion the Royal Regiment of Fusiliers was killed, on May 26, 2013 in London, England. Drummer Lee Rigby of the 2nd Battalion the Royal Regiment of Fusiliers was murdered by suspected Islamists near London's Woolwich Army Barracks. His family visited the scene of his murder today and left floral tributes whilst it was confirmed by the Foreign Office that one of the suspects, Michael Adebolajo, was arrested in Kenya in 2010.  (Photo by Matthew Lloyd/Getty Images)