This is a great sci-fi film from the pre-space age era. This remains on my short list of Sci-fi films I'd like to see again but can't find. It uses stock footage of V-2 rockets and others from the early atom bomb tests. It is very good to excellent and a darned shame that it is not available on vhs. Younger sci-fi buffs who haven't seen it are missing out on a good example of this 1950s genre.