By PIERRE THOMAS (@PierreTABC) , JACK DATE, ANN COMPTON (@AnnCompton) , JIM AVILA (@JimAvilaABC) and JEFF ZELENY April 17, 2013 A letter addressed to President Obama that field-tested positive for the poison ricin was received at the remote White House mail screening facility Tuesday, according to law enforcement officials. Law enforcement officials emphasized that these tests are preliminary and are often… Continue reading Suspicious Letter Sent to President Obama Tested Positive for Ricin
