I'm trying to remember a movie I saw many years ago. I think the movie was made in the late 60's or early 70's.
One of the main gadgets was a kind of tank that burrowed underground with a laser cannon sticking out a tube in front.
I seem to remember that the movie had a lot of cold war USA vs USSR politics at the beginning. The plot twist was that the Americans believed the Soviets had a burrowing laser tank. However they were shocked to find out that actually the other tank was Chinese.
Even as a kid, I remembered that the burrowing laser tanks were painted plywood boxes on golf-carts. Also they made the weirdest noise when the laser was on. It sounded like a cross between an organ and car horn.
Can anyone link me to suggestions?
