Letters of last resort
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The letters of last resort are four identically worded handwritten letters from the prime minister of the United Kingdom to the commanding officers of the four British nuclear-powered ballistic missil
HMS Vigilant, one of four Vanguard-class submarines comprising the UK's nuclear deterrent.
Cheget
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Cheget is a "nuclear briefcase" and a part of the automatic system for the command and control of Russia's Strategic Nuclear Forces named Kazbek. From when it was first developed, a "nuclear suitcase"
Letters of last resort
…The KGB's attempts to obtain the contents of the letters of last resort are part of the plot of the BBC Cold War spy drama The Game (2014). Cheget Dead Hand…
The Russian "nuclear briefcase" from the early 1990s on display at the Boris Yeltsin Presidential Center in Yekaterinburg.
Then-Acting President Vladimir Putin receiving the "nuclear briefcase" on 31 December 1999.
The ceremony of passing the "nuclear briefcase" during Vladimir Putin's third inauguration on 7 May 2012.