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
The Bridge of Sighs (poem) (Watts Gallery, Compton, Surrey). The poem was also illustrated in a bas-relief on Hood's tomb. Former Procul Harum guitarist Robin Trower released a certified Gold album of the same name with the title track song "Bridge of Sighs" in 1974 The Bridge of Sighs (poem) "The Bridge of Sighs" is a famous poem of 1844 by Thomas Hood concerning the suicide of a homeless young woman who threw herself from Waterloo Bridge in London. Although Thomas Hood (1799–1845) is usually regarded as a humorous poet, towards the end of his life, when he was on his sick bed, he wrote