A half brother of Osama bin Laden says the terrorist's family has its own information that bin Laden is alive and that he does not have kidney disease requiring dialysis. In an interview with CNN correspondent Rula Amin, Sheikh Ahmad -- who did not want his last name revealed -- also said he does not believe that bin Laden, part of a large and wealthy Saudi family, could be behind the September 11 attacks against the United States.Sheikh Ahmad spoke fondly of his older brother, describing him as a simple, deeply religious man with "a very soft heart" who "hates injustice." Such words stand in stark contrast to how President Bush and other world leaders have described bin Laden, branding him the mastermind behind the September attacks.