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
Angel Street, London headquarters of British Telecom. Angel Street, London Angel Street, once Angell Street, is a short street in the City of London that runs between King Edward Street in the west and St. Martin's Le Grand in the east. The street is recorded on John Ogilby and William Morgan's "Large Scale Map of the City As Rebuilt By 1676" which shows the plan of London after its rebuilding following the Great Fire of London in 1666. Today the street is made up on the north side of the former post office buildings of 1 St Martin's Le Grand and on the