The United States and Russia signed the Moscow Treaty, agreeing to limit their nuclear arsenals.
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The US tested the TX-17 thermonuclear bomb for the first time in Bikini Atoll of the Marshall Islands.
Samuel Colt patented the multi-shot revolving cylinder gun.
North Korea tested its first intercontinental ballistic missile (ICBM).
The US SM-65 Atlas missile completed the first successful intercontinental ballistic missile launch.
The first of 126 nuclear tests started at the Nevada Test Site.
