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
Sackville Street, London Sackville Street, London Sackville Street is a street in central London which today is mainly composed of offices and the rears of retail premises, but once was the home to several important medical figures. The street runs between Vigo Street in the north and Piccadilly in the south. It has no other exits. The land on which Sackville Street stands, like Albany and Burlington House, was formerly known as Stone Conduit Close. It was bounded on one side by Penniless Bank and on the other by Swallow Close. It passed into Crown ownership in 1536 and formerly belonged to the