Actually, I am only watching FOX. But it’s also in this article I found, as well as some information I don’t remember...
....”In 2003 an envelope containing ricin was sent to the White House but was intercepted by the Secret Service. Ricin also was found in a similar envelope at a South Carolina postal facility.
It also was detected in a Senate mailroom in 2004.”....
http://news.yahoo.com/s/nm/20080229/us_nm/usa_ricin_dc_2
more...
“The man who brought the substance to the manager told police he found it in a suite and it did not belong to him, police Capt. Joseph Lombardo said at a news conference Thursday night. Lombardo did not identify the man.
“Ricin has no medical uses other than cancer research,” Lombardo said. “An individual citizen other than being involved in cancer research or cancer prevention would not have any legal means or proper means of having that.”...
http://www.startribune.com/nation/16106722.html
Thanks for the link. AQ has been messing with ricin for years and it boggles the mind why the news and FBI is so dismissive of this so soon!