The only name you will recognize from the cast of Rocket Attack USA is that of Art Metrano who came to be a respected character actor most noted for being Captain Mauser in the Police Academy films. I'm sure he must have shuddered with horror at being associated with this monstrosity of a Cold War era film made to exploit the paranoia surrounding the Sputnik launching.
With a lot of newsreel footage Rocket Attack USA is two different films stitched rather clumsily together both very bad. The first film is a documentary style film about the importance of making rocket research our number one defense priority. With the launch of Sputnik that means the Soviets have a definite lead in missiles if they can put a satellite in orbit. Right around this time we were hearing talk of a 'missile gap' by candidates for president in real life.
The second is maybe the worst espionage story in history as we send in an agent to stop the launch of a missile with an atomic warhead bound for New York. No gimmicks or gadgets and two of the worst players in the history of film get in a little nookie while attempting to stop the Russian rocket.
Definitely right up there with anything that Ed Wood ever created and probably worse. Poor Art Metrano, you'll see him briefly playing a truck driver. He must have cringed at the mention of Rocket Attack USA.
