Many of the challenges relating to CBR terrorism prevention will be facilitated with the introduction of new technologies developed to address this emerging threat. As vendors and products come to market, it is important that the designer evaluate performance claims with a close level of scrutiny. Vendors should be willing to guarantee performance specs in writing, provide proof of testing (and show certified results) by an independent, reputable lab, and the testing conditions (e.g., flow rate, residence time, incoming concentrations) should be consistent with what would be experienced within the owner’s building. For CBR developments, proof of federal government testing and acceptance may be available.