Nelson Mandela joined over 22,000 people in London's Trafalgar Square to urge the world's leaders to Make Poverty History. Supported by Bob Geldof and Oxfam's Adrian Lovett, Mandela issued a call for everyone who cares about the world's poor to sustain the pressure on the world's wealthiest nations in the run-up to the G8 meeting this summer. Watch the speeches from Mandela and Geldof right here on OneWorldTV.