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
Portrait of Isabel Rawsthorne Standing in a Street in Soho Portrait of Isabel Rawsthorne Standing in a Street in Soho Portrait of Isabel Rawsthorne Standing in a Street in Soho is a 1967 oil on canvas painting by the British figurative artist Francis Bacon, housed in the Alte Nationalgalerie, Berlin. Described by art critic John Russell as one of Bacon's finest works, it depicts Isabel Rawsthorne, the painter, designer and occasional model for artists such as André Derain, Alberto Giacometti and Picasso. Bacon met her in the late 1940s through Erica Brausen, who was exhibiting both artists in her Hanover Gallery in London. He portrayed Rawsthorne many times, including three