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 (1940 film) in New York and shortly after in London to positive reviews. "It owed much to the dialogue of Robert E. Sherwood's original play, and to good, shrewd screen directing." The film is recognized by American Film Institute in these lists: According to MGM records the film earned $1,250,000 in the US and Canada and $1,217,000 elsewhere resulting in a profit of $491,000. "Waterloo Bridge" was dramatized as a half-hour radio play on two broadcasts of "The Screen Guild Theater", the first on January 12, 1941 with Brian Aherne and Joan Fontaine and the second on September 9, 1946 with Barbara