Now the KGB no longer master of his secrets. The democratic revolution in Eastern Europe poses in front of the KGB is very unpleasant for him the possibility of how, during the "Prague Spring" of 1968, the publication of some of its secrets through the former Soviet bloc allies. The mystery, which certainly should excite Kryuchkov personally - this dossier DS Bulgarian service of the murder of Bulgarian emigrant writer Georgi Markov in October 1978. In just a few months before his death Markov Bulgarian Communist Party General Secretary Todor Zhivkov was looking to promote the KGB, to silence immigrants, for example, his former protege Markov, who now have made an attack on the very Zhivkov through the Western media. Center responded and gave Zhivkov and the Bulgarian Durzhavna Sigourney (to some samples from the arsenal of top secret KGB laboratory, giving OTU (operational and technical management) and under the direct control of the KGB chairman. Kryuchkov personally approved the appointment of General Sergei Mikhailovich Golubev of control to PSU for communication with the DS and the use of poison developed by the KGB laboratory. (After seven years Golubev controlled use of poison developed in the same lab to Gordievsky during a failed attempt to force it to admit.) during 1978 Golubev three or four I went to Sofia to to help my colleagues to plan an operation against immigrants.