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
Killer Cop released in Italy on March 27, 1975 where it was distributed by Prouzioni Atlas consorziate (P.A.C.). It grossed 854,798,250 Italian lire. "Killer Cop" has been released on DVD in Italy by Cecchi Gori with a running time of 92 minutes and 58 seconds. Killer Cop Killer Cop () is a 1975 Italian poliziottesco-crime film directed in 1975 by Luciano Ercoli. The film's plot reprises the very real Piazza Fontana bombing which happened in Milan in 1969. The gun in the umbrella used in the movie is similar to a Bulgarian umbrella used at London in 1978 to kill Bulgarian dissident