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 Top Weekly Tip Top Weekly Tip Top Weekly was a magazine, published by Street & Smith, which ran for more than 800 issues. It began April 19, 1896 with an August 12, 1912 title change to New Tip Top Weekly. Making a 1915 transition from a story-paper tabloid to a standard pulp magazine format, it was retitled Tip Top Semi-Monthly and then became Wide Awake Magazine from December 10, 1915 to June 10, 1916. Promoted as "an ideal publication for American Youth," this magazine featured several fictional heroes but was mainly devoted to the ongoing adventures of student Frank Merriwell, who began