Public Enemy's Chuck D is one of the pioneers of hip-hop and one of the most respected figures in all of music over the past couple of decades. He is credited with redefining hip-hop and being a fundamental figure within its growth from the underground clubs and street corners, to mainstream acceptance with street billboards, Grammies and massive turnovers. Chuck D, though, has never lost what it was that made him such an engaging figure and author of some of the medium's most enduring anthems. The hip-hop legend recently spoke to John Balfe ahead of Public Enemy's Electric Picnic performance.