In one of the longest-held secrets of the Cold War, the U.S. Army explored the potential for using radioactive poisons to assassinate "important individuals" such as military or civilian leaders, according to newly declassified documents obtained by The Associated Press.
U.S. considered radiological weapon
On November 1, 2006, former lieutenant colonel of the Russian Federation’s Federal Security Service Alexander Litvinenko suddenly fell ill and was hospitalised.
Alexander Litvinenko poisoning
[Another] priority was "munitions for attack on individuals" using radioactive agents for which there is "no means of therapy."
U.S. considered radiological weapon
He died three weeks later, becoming the first known victim of lethal polonium-210-induced acute radiation syndrome.
Alexander Litvinenko poisoning
"This class of munitions is proposed for use by secret agents or subversive units for lethal attacks against small groups of important individuals, e.g., during meetings of civilian or military leaders," it said.
U.S. considered radiological weapon
The use of polonium in the poisoning has been seen as proof of involvement of a state actor, as more than microscopic amounts of polonium can only be produced in nuclear reactors.
Alexander Litvinenko poisoning
The Dec. 16, 1948, memo said a lethal attack against individuals using radiological material should be done in a way that makes it impossible to trace the U.S. government’s involvement, a concept known as "plausible deniability" that is central to U.S. covert actions.
U.S. considered radiological weapon
Vladimir Putin’s aide Sergei Yastrzhembsky commented: "The excessive number of calculated coincidences between the deaths of people, who defined themselves as the opposition to the Russian authorities, and major international events involving Vladimir Putin is a source of concern. I am far from believing in the conspiracy theory, but, in this case, I think that we are witnessing a well-rehearsed plan of the consistent discrediting of the Russian Federation and its chief. In such cases, the famed "qui bono"[sic] question has to be asked."
Alexander Litvinenko poisoning