In a This Day in History video, learn that on July 13, 1985, the sixteen hour concert, Live Aid, was broadcasted around the world. Rock Musician Bob Geldof created the concert in attempt to raise money to relieve hunger in Africa. Live Aid was officially opened in London by Prince Charles and Princess Diana; the concert took place simultaneously in Philadelphia. Over a billion people watched some of rock's biggest acts: Queen, Mick Jagger, David Bowe, Madonna, and Ozzy Osborne. Live Aid raised over $125 million and Geldof was knighted by the Queen for his part.