The National Air and Space Intelligence Center, with headquarters at Wright-Patterson Air Force Base, Ohio, is the primary Defense Department producer of foreign aerospace intelligence. NASIC develops its products by analyzing all available data on foreign aerospace forces and weapons systems to determine performance characteristics, capabilities, vulnerabilities and intentions. The center's assessments are also an important factor in shaping national security and defense policies. As the DoD expert on foreign aerospace system capabilities, the center historically has also been involved in supporting American weapons treaty negotiations and verification.