Washington Post: Authorities intercepted a letter addressed to President Obama that contained a substance that tested positive for the toxin ricin.
Washington Post: Authorities intercepted a letter addressed to President Obama that contained a substance that tested positive for the toxin ricin.
The letter follows the discovery Tuesday of a ricin-laced letter sent to Sen. Roger Wicker (R-Miss.) and came as authorities were investigating suspicious packages in and near the offices of members of Congress.
