The National Reconnaissance Office (NRO) develops and operates unique and innovative overhead reconnaissance systems and conducts intelligence-related activities for U.S. national Security. The National Reconnaissance Office's (NRO) systems are critical to National Security, U.S. policy makers, and war fighters. These systems provide the foundation for global situational awareness, and address the nation's toughest intelligence challenges. Frequently, NRO systems are the only collectors able to access critical areas of interest, and data from overhead sensors provides unique information and perspectives not available from other sources. The NRO's key customers and mission partners include: policy makers, the Armed Services, the Intelligence Community, Departments of State, Justice and Treasury, and civil agencies.
(From: http://www.nro.gov/about/nro/who.html)
The Falcon and the Snowman by 
The Spy in the Russian Club by