Ricin the attack on Georgi Markov another Bulgarian defector, Vladimir Kostov, survived a similar attack. Kostov was standing on an escalator of the Paris metro when he felt a sting in his lower back above the belt of his trousers. He developed a fever, but recovered. After Markov's death the wound on Kostov's back was examined and a ricin-laced pellet identical to the one used against Markov was removed. Several terrorists and terrorist groups have experimented with ricin and caused several incidents of the poisons being mailed to U.S. politicians. For example, on May 29, 2013 two anonymous letters sent to
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