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
London Waterloo station crossing the river, and was also inspired by the 1951 Festival of Britain. The band's biographer, Nick Hasted said the song "has made millions contemplatively pause around Waterloo, a busy urban area the record gives a sacred glow." Citations Sources London Waterloo station Waterloo station (), also known as London Waterloo, is a central London terminus on the National Rail network in the United Kingdom, located in the Waterloo area of the London Borough of Lambeth. It is connected to a London Underground station of the same name and is adjacent to Waterloo East station on the South Eastern main