Great action flick before it became a thing. Clint Eastwood, shooting up bad guys with a submachine gun ... he'd waste less bullets if he was "The Man with No Name". But a pretty good spy flick. All sorts of plot twists and guys with suspicious loyalties. I couldn't figure out why they planted these trip mines on the way up but you realize later ... GOOD IDEA!! Whenever people mention actresses Mary Ure and Ingrid PItt, I think of this film. Richard Burton, often a ham in other films, is remarkably in character in this flick.