(Translation: military can take on role of domestic law enforcement in disaster scenarios. Yep, they can go after the citizens they are supposed to protect unconditionally)

Fron DHS website:

Describe the major role of the U.S. Department of Defense and NORTHCOM in domestic emergency management.

Recalling session #11 regarding intergovernmental relations, the U.S. Department of Defense (DoD) provides help in disasters and terror events through various Emergency Support Functions under the National Response Plan/Framework (NRP/F) and must do so consistent with the National Incident Management System (NIMS).

DoD itself is restricted in the sense that contributions its military and civilian workers provide to civilian authorities “must not interfere with DoD’s ability to perform its primary mission or adversely affect military preparedness.”

Note as well that specific military authorities are paired with civilian counterparts at different levels of government in a disaster or emergency.
Military forces are authorized to support law enforcement at Federal, State, local level in any Weapon of Mass Destruction event.

DoD plays a lead role in any bioterrorism event or any event involving use of nuclear materials by enemies of the nation. In formal terms, the U.S. Attorney General may request DoD aid in matters involving nuclear materials, if law enforcement would be impaired without DoD help and if civilian law enforcement personnel are not capable of enforcing the law.

In other types of catastrophes, disasters, or emergencies, DHS (and FEMA) is lead or primary Federal agency in coordinating emergency response and recovery with State and locals. In such circumstances, DoD is then a supporting agency.

When the Federal government is responding to a terrorist or criminal act, the Federal Bureau of Investigation (FBI) is the lead or primary Federal agency. The FBI is a law enforcement agency first and foremost but it, like FEMA, has been recruited by national law and policy into the fight against terrorism and terrorist threat.

The same DoD assets and abilities that make it an effective responder to disasters outside the U.S., make it well qualified to respond inside the U.S. to the same types of disasters. FEMA routinely reimburses DoD