In a letter to its personnel and subdivisions, the Collegium of the State Security Committee of the USSR (KGB) urges operatives to become more vigilant in their work and personal conduct as the 27th Congress of the CPSU approaches and in light of raised international tensions.

This document describes the deficiencies which were made in activities aimed at overlapping of Chernobyl disaster’s consequences. These deficiencies could lead to new victims because the security rules of handling with dangerous radioactive materials were broken.

Radiation levels in Pripyat and the surrounding area following the Chernobyl nuclear disaster.

Physicists at the Academy of Sciences give advice for containing the Chernobyl nuclear disaster.

This KGB report provides a chronology of the Chernobyl nuclear disaster, and gives information on the disaster's first victims.

A report from KGB Chairman Andropov to the Central Committee of the CPSU assessing the status of Radio Liberty and Radio Free Europe in their “transition” period and measures that might be taken to weaken them. It alleges that RFE and RL are planning subversive actions against the USSR at the Munich Olympics. It credits the Soviet bloc intelligence services with increasing the problems of the Radios. The document indicates timely KGB knowledge of internal RL documents such as the March 15, 1971 revision of the Radio Liberty Policy Manual.

The following KGB document reports on problems jamming Western radio stations in a range of Soviet cities. It indicates times and frequencies on which Western radio broadcasts were clearly audible and Soviet jamming was ineffective.

In the statement by KGB Chairman Chebrikov at the Bloc Meeting held on 23 April 1980 to discuss foreign “hostile actions,” including Western radio broadcasting, special attention is given to attempts to form a political opposition in the socialist countries.

The KGB informs the Central Committee of RL policy guidelines concerning programs dealing with the USSR. While the first paragraph indicates “Free Europe,” the content of the note makes clear that Radio Liberty is meant. The original memorandum on which the note was based [a copy could not be located in the RFE/RL archives for comparison] was probably taken from Radio Liberty headquarters in Munich.

This report from the KGB contains results from intelligence activities conducted in April 1989 aimed at exposing indicators of a surprise nuclear missile attack on the USSR.