Todor Zhivkov to 1988, Bulgaria won an unprecedented 153 Olympic medals and numerous European and world competitions in sports as diverse as volleyball, rhythmic gymnastics and wrestling. Dissent was punished under Zhivkov's rule. The CSS was a feared tool of control, and overt opposition largely stayed underground until the late 1980s. In 1978, the Bulgarian dissident Georgi Markov was assassinated in London by an agent who stabbed him with an umbrella tip which implanted a very small ricin ball. According to former KGB general Oleg Kalugin, this was requested by Zhivkov and either performed by the KGB or it assisted the CSS;
London Bridge station by Network Rail. It has a ticket hall and entrance area with its main frontage on Tooley Street, and other entrances on Borough High Street and within the main line station concourse. It is one of two mainline London termini south of the River Thames, the other is Waterloo. The Underground station is on the Jubilee line and the Bank branch of the Northern line. Several London Buses routes, including 43 and RV1, pass the station; some via the bus station. River buses use the nearby London Bridge City Pier. London Bridge station was opened on 14 December 1836, making