Sensing that Gen. Musharraf would have it easy with a greenhorn from PPP if Benazir is out of contenion and is not sincerely providing security cover, CIA to execute the American plan have put their own intelligence apparatus in action. It was they who informed Benazir half an hour before that the suicide bomber was let loose and can strike at any moment and advised her to go hiding into the vehicle. It was then Benazir climbed down from top under the pretext of resting forawhile.
If Benazir is dead, all the carefully calculated US moves will go awry and takes considerable time to build up alternatives; meanwhile Musharraf will enjoy the vacuum.
