The Department of Homeland Security's Countering Weapons of Mass Destruction Office intends to solicit R&D proposals for technologies to counter WMD threats under a 5-year Broad Agency Announcement. The overarching BAA will remain open for five years, but specific opportunities will be issued periodically as individual Areas of Interest posted on SAM.gov. Proposals will only be accepted during the timeframes specified within those posted AOIs. Each AOI will detail its specific scope, proposal instructions, and performance timelines. Prospective bidders must monitor SAM.gov regularly for new and updated AOI postings to identify relevant opportunities.