While walking across Waterloo Bridge in London, Bulgarian dissident <a href="https://en.wikipedia.org/wiki/Georgi_Markov" id="mwAUg" rel="mw:WikiLink" title="Georgi Markov">Georgi Markov</a> is assassinated by Bulgarian secret police agent <a href="https://en.wikipedia.org/wiki/Francesco_Gullino" id="mwAUk" rel="mw:WikiLink" title="Francesco Gullino">Francesco Gullino</a> by means of a <a href="https://en.wikipedia.org/wiki/Ricin" id="mwAUo" rel="mw:WikiLink" title="Ricin">ricin</a> pellet fired from a specially-designed umbrella.