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
Waterloo Bridge Waterloo Bridge Waterloo Bridge () is a road and foot traffic bridge crossing the River Thames in London, between Blackfriars Bridge and Hungerford Bridge. Its name commemorates the victory of the British, the Dutch and the Prussians at the Battle of Waterloo in 1815. Thanks to its location at a strategic bend in the river, the views from the bridge (of Westminster, the South Bank and the London Eye to the west, and of the City of London and Canary Wharf to the east) are widely held to be the finest from any spot in London at ground level. The