To help authorities trace the source of the deadly letters, bioforensic analysts, Los Alamos National Laboratory scientists among them, worked diligently to pinpoint the specific strain of bacteria used. This summer, recognizing Los Alamos' technical capabilities, the US Department of Homeland Security (DHS) allocated $4 million for a new research and development program in bioforensics under the sponsorship of the National Bioforensic Analysis Center (NBFAC) of the DHS.