Pink Floyd is one of the greatest and most successful bands of all time, and that is due mostly to the lyrics and ideas of Roger Waters and the guitar-playing and musical acumen of David Gilmour. Together, they guided the band through masterworks like "Dark Side Of The Moon" and "Wish You Were Here." But just as they achieved massive popularity, their partnership came undone by a destructive power struggle that ultimately sent Waters packing. He thought he was Pink Floyd by himself, but Gilmour later proved him wrong — or did he?