This spectacular photo shows the test of a nuclear torpedo detonated today in 1955 by the Soviet Union at Novaya Zemlya, an archipelago above the Arctic Circle. The weapon sent a massive debris cloud erupting into the atmosphere, which you can see in a video here. It was one of seven tests the Soviets conducted that year, and they and the United States were just getting heated up in their insane nuclear race.
It was full speed ahead in the Cold War.