This solicitation is a Broad Agency Announcement (BAA) issued under the provisions of paragraph 6.102(d)(2) of the Federal Acquisition Regulation (FAR) to provide for the competitive selection of research proposals. A formal Request for Proposal (RFP) will not be issued. The Department of Homeland Security (DHS) Science & Technology (S&T) Directorate is soliciting Full Proposals which will be evaluated in accordance with this BAA. Contracts based on responses to this BAA are considered to be the result of full and open competition and in full compliance with the provisions of Public Law (PL) 98-369, "The Competition in Contracting Act of 1984." Awards under this BAA are planned in Fiscal Year (FY) 2012. No contract awards will be made until appropriated funds are available from which payment for contract purposes can be made.