Fighting in the Gray Zone. A Strategy to Close the Preemption Gap.
The US 2002 National Security Strategy (NSS) identified the proliferation, privatization, and acquisition of weapons of mass destruction by terrorist groups and rogue states as the critical nontraditional threat of the 21st century. Published in September 2004, US Army War College. Authored by Joanne M. Fish, Samuel F. McCraw and Christopher J. Reddish.