One of this movie's main posters was designed in painted artwork featuring Sean Connery standing in a James Bond-like pose with a television camera instead of a gun and with two girls in bikinis at his feet. In the background inside a circle (evoking a gun barrel) were two scenes of action, while in the air above was a spy satellite. All these elements were typical of the James Bond movie franchise which Connery had been a big part of. This was not the original poster for this movie. The Bond-type poster was used in various non-USA markets, replacing the original poster after the film was a commercial failure in North America. This was the second 'Sean Connery non-Bond film to have a Bond-like poster in just a few years, as the main movie poster for Cuba (1979) was also designed like a Bond movie poster.
This movie's original American movie poster showed Sean Connery in the foreground with an atomic / nuclear bomb exploding into a mushroom cloud in the background. A number of Hollywood movie's made during the early 1980s covered the subject of nuclear / atomic war and the bomb. Other films made during the 1980s which depicted mushroom clouds featured on their posters included The Day After (1983) (theatrical release); One Night Stand (1984); and The Atomic Cafe (1982).
(at around 1 min) The design of the suitcase bombs is shown to President Lockwood. The bombs are said to contain plutonium, but the design shown fits the uranium bomb (the cannon design), not plutonium bomb (the fission sphere design) - a very distinctive difference President's aides should know.
The lighting changes between the live and the obvious studio shots of Hale parachuting from the plane in the opening sequence. For example, there are 3 light sources in the studio shot reflected on his helmet (including one from in front of him as he looks out from the plane), rather than just the sunlight from above.