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Sunday 8 December 2024

This is the moment a 20-ton door, designed to withstand a nuclear blast, swung shut during tests at a subway station under the streets of Prague.
The door is a part of Prague’s Metro Protection System (Ochranny System Metra, or OSM), a network of hardened shelters designed to safeguard people during a nuclear, chemical, or biological attack.
RFE/RL was given unprecedented access to a network of Cold War-era shelters within Prague's subway system, designed to be a refuge during war.