Defense Science Board Summer Study Task Force on DoD Responses to Transnational Threats, Volume I: Final Report [open pdf - 6MB]
"In response to joint tasking from the Under Secretary of Defense for Acquisition and Technology and the Chairman, Joint Chiefs of Staff, the 1997 DSB Summer Study Task Force addressed the Department's Responses to Transnational Threats. In the study, the Task Force concludes that the Department should treat transnational threats as a major Department of Defense mission. Transnational actors have three advantages: 1) they can have ready access to weapons of mass destruction; 2) we cannot easily deter them because they have no homeland; and 3) they respect no boundaries, whether political, organizational, legal or moral. Further, warning may be short and attribution may be slow or ambiguous. Since the United States is now the dominant military force in the world, potential adversaries will be driven to asymmetric strategies to meet their objectives. As such, transnational threats represent an important national security problem."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/