This article from Radar magazine discusses (all in good histrionic-free reporterese) "Main Core", the database that may identify contain up to 6 million names the Fascist's in power would want to round up if they ever got their martial law,. Also covers what FEMA's real mission is (big surprise it doesn't do well responding to natural disasters, since its real purpose is to impose martial law, installing military governors in every state, activating the camps, etc.), and gives a good overview of the recent and longer-term history of these lists and the shadow government's planning for martial law. The latest wrinkles include the whispers of "Main Core", the creation of NorthCom, the civiliain-oversight free US Military Northern Command, and "Homeland Security Presidential Directive 20 (also known as NSPD-51), issued in May 2007, which reserves for the executive branch the sole authority to decide what constitutes a national emergency and to determine when the emergency is over".

Good review for those who know, pretty shocking for those who don't.