A diminutive, aging action hero who is clean-cut but controversial, world-famous yet utterly secretive: Tom Cruise's reign as the world's top movie star has long defied time, expectations and -- when stunts are involved -- gravity.
The daredevil star, who famously insists on doing his own leaps, chases and plunges, is widely predicted to perform a death-defying but top-secret stunt on the roof of the Stade de France for the Paris Olympics closing ceremony on Sunday.
