US Democratic Senator John Kerry says a video message from Osama Bin Laden sealed his defeat in a presidential race dominated by the 9/11 attacks. Mr Kerry told NBC TV his opinion poll lead over President George W Bush fell away after the tape was broadcast. He said national security was the decisive issue in the November 2004 poll, won eventually by President Bush. Osama Bin Laden's video, shown days before the vote, urged Americans to back neither Mr Bush nor Mr Kerry. "Your security does not lie in the hands of Kerry, Bush or al-Qaeda. Your security is in...