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
Gower Street, London December 1904 a London County Council blue plaque was put up, to "Charles Darwin Naturalist". The house suffered from bomb damage in 1941 during the Blitz, and was not repaired. In 1961 the site became part of the Biological Sciences building of University College London, with a new plaque. The long thin garden which backed on to Gower Mews North (later Malet Place) was incorporated into Foster Court car park in 1978. The etymologist and philologist Hensleigh Wedgwood, who was Charles Darwin's cousin and brother-in-law, lived at 94 Gower Street; he died there in 1891. On the wall of the