A Memorial Is Held On The 20th Anniversary Of The Murder Of Stephen Lawrence

LONDON, ENGLAND - APRIL 22: (L-R) Minister of State for Police and Criminal Justice Damian Green, Home Secretary Teresa May, Deputy Prime Minister Nick Clegg, mother of Stephen Lawrence, Doreen Lawrence, her son Stuart Lawrence, British Prime Minister David Cameron, Leader of the opposition Labour Party Ed Miliband and London Mayor Boris Johnson attend a memorial service for Stephen Lawrence at St Martin-in-the-Fields Church on April 22, 2013 in London, England. Stephen Lawrence, a black A-level student, was stabbed to death at a bus stop twenty years ago by a gang of white youths in a racially motivated attack in Eltham, south-east London, on April 22, 1993. Two men, Gary Dobson and David Norris, were found guilty of his murder in January 2012. (Photo by Peter Macdiarmid/Getty Images)