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 Covered Bridge bridge was either built or already standing at this site at that time. The present bridge was likely built in 1860, when the town paid $473.65 for construction of the "Waterloo Bridge". The low price suggests that the abutments were probably repaired rather than rebuilt. The site of the bridge at the Waterloo Falls was adjacent to a number of industrial enterprises using the water power of the river and would have been an important feature of the village; all of these businesses failed and there are now only foundational remains. Waterloo Covered Bridge The Waterloo Covered Bridge carries Newmarket