; (4) document the rationale for the selection of international destinations by FAMS for air marshal deployment and the proportion of flights to cover at each destination; (5) adopt a consistent name and definition for the performance measure referred to as the TSA coverage score that accurately reflects its calculation method and composite nature; and (6) report the performance results for each of the subcategories that comprise the TSA coverage score to FAMS and TSA leadership. 10. CBRNE detectors aboard public trans­por­ta­tion The Secretary of Homeland Security shall direct the Directorate of Science and Technology of the Department of Homeland Security to prioritize research of scalable, cost-effective technology solutions to detect chemical, biological, radiological, nuclear, and explosive threats aboard public transportation of all modes that are capable continuous, real-time sensing and detection of, and alerting passengers and operating personnel to the presence of such a threat.