Divers Chase Decades-Old Rumor, Find Classified Item That Was Never Meant To Go Public

The Nuclear Threat

Both East and West possessed the power to annihilate vast areas of land with one atomic bomb. No-one really wanted this to happen, and it was the threat from both sides that kept the other from attacking.

Nevertheless, the only way to feel safe is to have superior firepower. The Soviets started building aircraft that could carry their weapons over the Arctic to the US and Canada.