A Deadly Biological Weapon Unleashed. April 2, 1979. Another chilly spring day in Sverdlovsk, a city tucked away on the eastern slopes of the Ural Mountains, deep in the territory of the Soviet Union.

Andrei Kuryakov, chief of justice administration oversight directorate of the Sverdlovsk region prosecutor’s office, stressed that government agencies had nothing to do with that incident.

The archive of the Sverdlovsk KGB is the most important one ... Various versions of the incident were examined, including an avalanche hitting the tent, an attack by fugitive prisoners, an attack ...