The Long Island Press has noticed that the US military has quietly given itself the power to police Americans and "quell... civil disturbances."

The lines blurred even further Monday as a new dynamic was introduced to the militarization of domestic law enforcement. By making a few subtle changes to a regulation in the U.S. Code titled “Defense Support of Civilian Law Enforcement Agencies” the military has quietly granted itself the ability to police the streets without obtaining prior local or state consent, upending a precedent that has been in place for more than two centuries.

The most objectionable aspect of the regulatory change is the inclusion of vague language that permits military intervention in the event of “civil disturbances.” According to the rule:

Federal military commanders have the authority, in extraordinary emergency circumstances where prior authorization by the President is impossible and duly constituted local authorities are unable to control the situation, to engage temporarily in activities that are necessary to quell large-scale, unexpected civil disturbances.

Bruce Afran, a civil liberties attorney and constitutional law professor at Rutgers University, calls the rule, “a wanton power grab by the military,” and says, “It’s quite shocking actually because it violates the long-standing presumption that the military is under civilian control.”

... Michael German, senior policy counsel to the American Civil Liberties Union (ACLU), noted in a 2009 Daily Kos article that, “there is no doubt that the military is very good at many things. But recent history shows that restraint in their new-found domestic role is not one of them.”

So... does this mean America is now living under the hair-trigger threat of martial law? And what rises to the level of "civil disturbance"?