impossible not to marvel at his stamina.Tom Cruise showed off his incredible athleticism in new photos from the set of “Mission: Impossible – Dead Reckoning Part Two” in London on Sunday.In photos obtained by The Post, Cruise, 61, can be seen sporting shaggy hair and a white shirt drenched in fake blood as he sprints across Westminster Bridge. Big Ben and the Palace of Westminster appear in the background in the action-packed shot.While little is known about the film, which has been reported to serve as Cruise’s final appearance as Ethan Hunt, it can be assumed that Hunt will be forced to flee some sort of fancy gathering.