According to Russia’s Ministry of Emergency Situations, in the event of a nuclear attack on Moscow, there is space in underground facilities for all of the population . While this is a very bold claim, Moscow is famous for the massive amount of bunkers it has available for Civil Defense (гражданской обороны) and the military… On the largest level, the bunkers in Moscow can be classified into four types: basement, metro, metro-2, and sphere. The first two types are largely used for Civil Defense. The last two are primarily used by military and government agencies. The largest and most famous civil defense system in Russia is the Moscow Metro. The metro is specifically engineered to protect against nuclear attack, boasting not only depth but reinforcements on the tunnels and blast doors… – The National Interest Photo: Moscow Subway blast doors.