John, Funny the paper doesn't mention Cryptome's eyeballing project. :)) Abstract: U.S. decisionmakers require an analytical process for assessing whether publicly accessible geospatial information (e.g., maps, overhead images, Web site information) can help potential attackers, including terrorists, in selecting and planning attacks on U.S. critical sites. This book provides a framework to assist U.S. decisionmakers by applying three key criteria  usefulness, uniqueness, and societal benefits and costs  to assessing the homeland security implications of geospatial information. http://www.rand.org/publications/MG/MG142 Keep up the great work. Regards, JP