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
Waterloo Road, London Waterloo Road, London Waterloo Road is the main road in the Waterloo district of London, England straddling the boroughs of Lambeth and Southwark. It runs between Westminster Bridge Road close to St George's Circus at the south-east end and Waterloo Bridge across the River Thames towards London's West End district at the north-west end. At the northern end near the river are the Queen Elizabeth Hall and the Hayward Gallery to the west, the National Film Theatre below the road, and the Royal National Theatre to the east. In earlier times, this was the location of Cuper's Gardens. Just to