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 Waterloo Covered Bridge The Waterloo Covered Bridge carries Newmarket Road over the Warner River near the Waterloo Falls in Warner, New Hampshire. The Town lattice truss bridge was built in 1859-60, replacing an earlier span at the same location, and is one of New Hampshire's few surviving 19th-century covered bridges. The bridge was listed on the National Register of Historic Places in 1976, and included in the Waterloo Historic District in 2003. The Waterloo Covered Bridge is located in western Warner, spanning the Warner River in a roughly northeast-southwest orientation. The bridge is a single span with a span length