50th Anniversary of '' March on WashingtAug 28,1963 '' - Aug 28,2013

US President Barack Obama has linked the ongoing struggle for economic equality in America with the goals of the 1963 March on Washington, in a speech marking its 50th anniversary

Barack Obama, the first black US president, said ensuring economic opportunity was "our great unfinished business"

Barack Obama gave his address at the Lincoln Memorial on the National Mall in Washington DC almost 50 years to the minute after Martin Luther King Jr culminated the march with his celebrated I Have a Dream speech The time - 15:00 local time (19:00 GMT) - was marked by ringing bells

Barack Obama was joined on the stage by former Presidents Bill Clinton and Jimmy Carter, who also spoke

Members of Martin Luther King's family and veterans of the march also spoke