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
Tip and Trade Tip and Trade Tip and Trade is a 2011 true crime book by Canadian author Mark Coakley, that depicts an insider trading conspiracy involving Wall Street lawyer Gil Cornblum and another lawyer, Stan Grmovsek, who were found to have gained over $10 million in illegal profits over a 14-year span. The crime was detected in 2008. Cornblum committed suicide before criminal charges were laid. Grmovsek pleaded guilty and was sentenced to 39 months in prison; this was the longest term ever imposed for insider trading in Canada. Canada's national newspaper, "The Globe and Mail", called "Tip and Trade" "riveting." A