Interpretations of 2001: A Space Odyssey machines". Kubrick was also confronted with the fact that, during the production of the film, the US and USSR had agreed not to put any nuclear weapons into outer space by signing the Outer Space Treaty. Alexander Walker in a book he wrote with Kubrick's assistance and authorisation, states that Kubrick eventually decided that as nuclear weapons the bombs had "no place at all in the film's thematic development", now being an "orbiting red herring" which would "merely have raised irrelevant questions to suggest this as a reality of the twenty-first century". In the Canadian TV documentary "2001 and Beyond",
2001: A Space Odyssey (novel) a Space Shuttle launch, the adhesive sauces used to keep food firmly in place on one's plate, and even the zero-gravity toilet. Over the course of the novel, several minor characters either appear very briefly or are named only in passing, including other man-apes, spaceflight staff, lunar station security, and "Discovery" crew members. Among the novel's minor characters, some of the more consequential are listed below (often having direct film equivalents, or else being recurring characters in the "Odyssey" novel series). A sequel to the book, entitled "", was published in 1982 and adapted as a motion picture in 1984.