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
In Concert with The London Symphony Orchestra In Concert with The London Symphony Orchestra In Concert with The London Symphony Orchestra (also cited as "In Concert with The London Symphony Orchestra Conducted by Paul Mann") is a live album and DVD by the British hard rock Deep Purple, recorded on 25–26 September 1999 at the Royal Albert Hall in London with the London Symphony Orchestra, and released on 8 February 2000 on Eagle Records. The album was a project started in 1999 by keyboardist Jon Lord, who sought to recreate the band's innovative 1969 album, "Concerto for Group and Orchestra", of which the original score was lost.