Every activity is done under severe surveillance in the White House of the USA. Recently, an envelope addressed to the White House included a substance classified as ricin, a deadly poison, this information was given by several media outlets on Saturday. The envelope is believed to have come from Canada and was ambushed at a government mail center before it arrived at the White House, many leading American dailies reported.
About the reports, the FBI said the agency and "U.S. Secret Service and U.S. Postal Inspection Service partners are examining a suspicious letter received at a U.S. government mail facility. At this time, there is no known threat to public safety." The White House and U.S. Secret Service refused to comment. Ricin is found naturally in castor beans but it takes a careful act to convert it into a biological weapon. Ricin can lead a person to death within 36 to 72 hours from exposure to an amount as small as a pinhead.
There have been numerous incidents concerning envelopes mailed with ricin to U.S. officials. In 2018, a Utah man, William Clyde Allen III, was charged for making ricin-related threats, including mailing a threat against Trump and other federal officials including FBI Director Christopher Wray, with all the letters "containing castor bean material." Allen remains in custody. Two people were convicted in separate incidents of sending ricin-tainted letters to then-President Barack Obama.