The History of Terrorism
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Polonium
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1960s The presence of polonium in tobacco smoke has been known since the early 1960s.
1969 A large section of Russia was showered with Polonium in 1969.
2006 Poisoning of Alexander Litvinenko
2007 In 2007, Russian President Vladimir Putin posthumously awarded Koval the Hero of the Russian Federation decoration for "his courage and heroism while carrying out special missions".
2018 Yale University - Russian Intelligence Operations and the West
George Koval AKA DELMAR
Polonium is found in the food chain, especially in seafood.
Polonium-210 in tobacco contributes to many of the cases of lung cancer worldwide. Most of this polonium is derived from lead-210 deposited on tobacco leaves from the atmosphere,
Some of the world's biggest tobacco firms researched ways to remove the substance—to no avail—over a 40-year period. The results were never published.