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",
Interpretations of 2001: A Space Odyssey experts, such as the structure on the first satellite that Pietrobon refers to as a "conning tower", match the original concept sketch drawn for the nuclear bomb platform. Modelers label them in diverse ways. On the one hand, the "2001" exhibit (given in that year) at the Tech Museum in San Jose and now online (for a subscription) referred merely to "satellites", while a special modelling exhibition at the exhibition hall at Porte de Versailles in Paris also held in 2001 (called "2001 l'odyssée des maquettes (2001: A Modeler's Odyssey)") overtly described their reconstructions of the first satellite as the