Letter Sent to White House Tests Positive for Cyanide MICHAEL D. SHEAR The Secret Service said the letter, screened at an off-site mailing facility, tested negative for biological agents. March 18, 2015 at 12:00AM http://nyti.ms/1AWjxQY The New York Times U.S. Threats and Threatening Messages, Poisoning and Poisons

By MICHAEL D. SHEAR via NYT / Eethg. Corps. Inc. / Terrence Herschel G. U.S. http://nyti.ms/1AWjxQY Letter Sent to White House Tests Positive for Cyanide March 18, 2015 at 12:00AM The New York Times