Bulgaria–United States relations to work. Bulgaria became a member of the Warsaw Pact on May 14, 1955. Though no Soviet troops were stationed on Bulgarian soil, in 1968, Zhivkov sent a Bulgarian division to join Polish, Hungarian and Soviet troops to crush a popular uprising in Prague. In 1978, the Bulgarian secret police were implicated in the assassination in London of Georgi Markov, a Bulgarian dissident who was a correspondent for the BBC World Service, Deutsche Welle radio and the U.S. sponsored Radio Free Europe. Markov was assassinated with a poisoned umbrella on September 7, Zhivkov's birthday. The rise of democratic movements across
Poetry for the Poisoned song "The Great Pandemonium" and released on the band's official YouTube channel on September 6. In 2011, a reissue of "Poetry for the Poisoned" entitled "Poetry for the Poisoned & Live From Wacken: Limited Tour Edition" was released on April 15 in Europe and May 10 in the US. The album was released as a double-disc set, with the first disc featuring "Poetry for the Poisoned" as previously released and the second disc contained 8 live tracks from their show at Wacken Open Air 2010. Disc 1: Disc 2 - Live from Wacken Open Air 2010: Poetry for the Poisoned