The Homeland Security Act of 2002 (Public Law 107-296) states that Department of Homeland Security (DHS) Science & Technology Directorate (S&T) will "support basic and applied homeland security research to promote revolutionary changes in technologies; advance the development, testing and evaluation, and deployment of critical homeland security technologies; and accelerate the prototyping and deployment of technologies that would address homeland security vulnerabilities." Pursuant to this mission DHS S&T's Explosives Division (EXD) recognizes the need for state-of-the-art passenger screening at checkpoints that shall have the capability to screen passengers' exempt liquids and gels for the presence of liquid explosives and flammable liquids (pure or mixed with fuel). The Advanced Bottled Liquid Scanner (BLS) effort is intended to satisfy this requirement. This BAA sets forth the requirements to accomplish a variety of specific tasks related to the development of screening technologies for passenger carry-on bottled liquids and gels at the passenger checkpoint. The identified requirements presented here have a direct impact on meeting the requirements outlined in the Aviation and Transportation Security Act of 2001, Public Law 107-71.