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
Wood Green ricin plot There was no UK poison cell linked to al Qaida or Muhamad al Zarqawi. There was no ricin with which to poison London, only notes and 22 castor seeds . There was no one who even knew how to purify ricin. On 17 August 2006, Craig Murray summed up on "CounterPunch": I spoke at the annual Stop the War conference a couple of months ago [and] referred to the famous ricin plot... It was alleged that a flat in North London inhabited by Muslims was a "Ricin" factory, manufacturing the deadly toxin which could kill "hundreds of thousands of people".