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Congressional leaders confirmed on the 16th, a letter sent to the United States Mississippi Republican Senator Roger the Wick (Roger Wicker) was intercepted, this letter is detected with is called "the most terrible biological weapons"deadly ricin.

The date of the U.S. Cable News Network (CNN) first reported the news. Subsequently, the U.S. Senate Majority Leader Reid confirmed e-the living with ricin or other poisons letter addressed to Senator Roger Wick office. However, he did not disclose the letter when sent.

According to reports, the letter of a postal facility outside the Capitol screening was intercepted, has not been served on target. The envelope of this letter three times in a row measured ricin positive, it is sent to a Maryland laboratory for further testing.

Ricin is a long as a very small dose can cause toxins to kill. If inhaled or swallowed a lethal dose of only 1 mg, if injected, only 500 micrograms of this substance can kill an adult.

Assassinated by ricin precedent in history. 1978, fled the Western Bulgarian poet, writer Georgi Markov in the UK such as a bus stop when the bus, his thigh a man umbrella thorn. That night he appeared a high fever, and died three days later sent to the hospital. Forensic found in his leg with a small metal beads, with trace amounts of ricin. This event is also the hubbub of the "umbrella murder".