KGB to find them at home. In 1967, the campaign of this suppression increased under new KGB Chairman Yuri Andropov. After suppressing the Prague Spring, KGB Chairman Andropov established the Fifth Directorate to monitor dissension and eliminate dissenters. He was especially concerned with Aleksandr Solzhenitsyn and Andrei Sakharov, "Public Enemy Number One". Andropov failed to expel Solzhenitsyn before 1974; but did internally exile Sakharov to Gorky in 1980. The KGB failed to prevent Sakharov's collecting his Nobel Peace Prize in 1975, but did prevent Yuri Orlov collecting his Nobel Prize in 1978; Chairman Andropov supervised both operations. KGB dissident-group infiltration featured
KGB Council chairman. In the 1980s, the glasnost liberalisation of Soviet society provoked KGB Chairman Vladimir Kryuchkov (1988–91) to lead the August 1991 Soviet coup d'état attempt to depose President Mikhail Gorbachev. The thwarted "coup d'état" ended the KGB on 6 November 1991. The KGB's main successors are the FSB (Federal Security Service of the Russian Federation) and the SVR (Foreign Intelligence Service). The GRU (military intelligence) recruited the ideological agent Julian Wadleigh, who became a State Department diplomat in 1936. The NKVD's first US operation was establishing the legal residency of Boris Bazarov and the illegal residency of Iskhak Akhmerov