The Department of Homeland Security (DHS) Science and Technology (S&T) Directorate, Chemical and Biological Division, has issued a Broad Agency Announcement seeking to provide sound scientific techniques related to supporting attribution analyses leading to the capture, indictment, and prosecution of the perpetrators of a criminal or terrorist act involving the actual or threatened use of chemical threat agents. The primary internal customers of the DHS S&T Chemical Forensics program are law enforcement and intelligence components of DHS and the primary external customer is the FBI. Sol. No. BAA10-020. Respond by Sept. 28. Contact: Rodney Walters, contract specialist, 202-254-6380, [email protected].