"The commission formed after the terrorist attacks of September 11, 2001 identified a need for a better domestic intelligence capability, and policy decisions since then have directed increased information sharing between the intelligence community and the collective law enforcement community. This monograph outlines how the new operational environment, which includes the establishment of a new combatant command and the establishment of the Department of Homeland Security, affects domestic intelligence operations through a review of current regulations and policies affecting domestic intelligence operations. It advocates provision of intelligence support to established state level intelligence centers by each state's National Guard predominantly through information sharing, with the National Guard assets serving as a conduit for information between the intelligence community and the state intelligence fusion centers. It is beneficial to the each state's National Guard Joint Forces Headquarters to support this because of the capability for increases situational awareness, with little change to existing regulations due to the requirement to maintain a common operating picture. "
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/