VSB

The All-Union Security Service of the Union of Soviet Sovereign Republics (VSB) (Russian: Всесоюзная Служба безопасности Союза Советских Суверенных Республик (ВСБ); Vsesoyuznaya Služba Bezopaznosti Soyuza Sovetskih Suverennıh Respublik) is the principal security agency of the USSR and the successor agency to the Old USSR's Committee of State Security (KGB)'s successors, chiefly among them, the Russian Federal Security Service (FSB). Its main responsibilities are within the country and include counter-intelligence, internal and border security, counter-terrorism, and surveillance as well as investigating some other types of grave crimes and union-level law violations. Organizations with similar responsibilities in the individual SSR level are called national security services (Russian, Singular: Национальная служба безопасности). It is headquartered alongside the SVR in Lubyanka Square, Moscow's centre, in the main building of the former FSB and KGB.