Increasing calls for intelligence support and continuing innovations in intelligence technologies combine to create significant challenges for both the Executive and Legislative Branches. Intelligence, Surveillance, and Reconnaissance (ISR) systems are integral components of both national policymaking and military operations, including counterterrorism operations, but they are costly and complicated and they must be linked in order to provide users with a comprehensive understanding of issues based on information from all sources. Relationships among organizations responsible for designing, acquiring, and operating these systems are also complicated as are oversight arrangements in Congress. These complications have meant that even though many effective systems have been fielded, there have also been lengthy delays and massive cost overruns. Uncertainties about the long-term acquisition plans for ISR systems persist even as pressures continue for increasing the availability of ISR systems in current and future military operations and for national policymaking. These challenges have been widely recognized. A number of independent assessments have urged development of "architectures" or roadmaps setting forth agreed-upon plans for requirements and acquisition and deployment schedules. Most observers would agree that such a document would be highly desirable, but there are significant reasons why developing such an architecture and gaining an enduring consensus ...