1945194919521953195719581960
USA - 1st Atom bombUSSR - 1st Atom bombUSA - 1st Hydrogen bombUSSR - 1st Hydrogen bombUSSR - 1st ICBM (could take Hbomb to USA) - 1st Satellite 'Sputnik'USA - 1st ICBMs (aimed at USSR) and 1st satelliteUSA - 1st nuclear-powered submarine (can fire missiles)
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