Un sénateur américain aurait été la cible d'une tentative d'empoisonnement. Une lettre contenant du poison a été interceptée.
"The envelope was addressed to a U.S. senator, though the sources would not say which one.
Ricin is a highly toxic substance derived from castor beans. As little as 500 micrograms -- an amount the size of the head of a pin -- can kill an adult. There is no specific test for exposure and no antidote once exposed.
It can be produced easily and cheaply, and authorities in several countries have investigated links between suspect extremists and ricin. But experts say it is more effective on individuals than as a weapon of mass destruction.
http://www.cnn.com/2013/04/16/us/tainted-letter-intercepted/index.html
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