A visitor attends the nuclear defense Bunker 703, at a depth of 43 meters, in Moscow, Russia, 25 April 2021. The recently declassified facility of Cold War period, the bunker was in use by the ministry of Foreign Affairs until 2005. On 2018 was converted into the museum the Bunker 703. (Photo by Maxim Shipenkov/EPA/EFE)
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