On July 13, 1985, at Wembley Stadium in London, Prince Charles and Princess Diana officially open Live Aid, a worldwide rock concert organized to raise money for the relief of famine-stricken Africans. Continued at JFK Stadium in Philadelphia (where Joan Baez famously kicked it off by telling the crowd “this is your Woodstock, and it’s long overdue”) and at other arenas around the world, the 16-hour “superconcert” was globally linked by satellite to more than a billion viewers in 110 nations. In a triumph of technology and good will, the event raised more than $125 million in famine relief for Africa.