When I first saw this movie in 1971, it impressed me, and my friends, very much. I saw it at least 4 or 5 times. This is one of the most important films of the '70, a political fiction of its time... but in a revision a few days ago in VHS, a film that seems as new as before, very actual. Although I think that Rosenberg was not the most indicate director for this film (Frankenheimer seems to me a most appropriate election, due to his asphyxiating atmospheres), the strong of the story and the interpretation of an extraordinary Anthony Perkins, among the others actors, gives its force to the movie. It is a pity that there are no DVD edition (I suspect that the Spanish exhibition in its time was very censured...) for to see that film in good conditions. The people that doesn't know are missing a very notable film. I liked so much that in my blog I have written a long essay about the film, for the benefit of the young people that doesn't know it.