Keywords: October 2003 ricin letter warning label.jpg en An FBI photograph of the warning on the envelope included with a ricin contaminated letter that was discovered on October 15 2003 in Greenville South Carolina The letter was written to the U S Department of Transportation but contained no delivery address and no postmark FBI photo via http //ftp cdc gov/pub/epr/planning/prepconf2005/presentations/cross_cutting_goals/surveillance/DanielDrociuk pdf CDC report Federal Bureau of Investigation c October 15 2003 Public domain see license PD-USGov-FBI PD-USGov 2003 ricin letters |