The department of homeland security leads the unified

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The Department of Homeland Security leads the unified national effort to secure America by preventing and deterring terrorist attacks and protecting against and responding to threats and hazards to the Nation. DHS is DOD's principal agency partner in Homeland Defense. North American Aerospace Defense Command (NORAD) is a binational command operating based on an agreement between the United States and Canada to respond to aerospace and maritime threats to North America. In addition, the private sector owns and operates much of the critical infrastructure within the United States. Protection of this infrastructure requires communication and coordination with these private organizations, both before and during crisis.
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Department of Homeland Security -As we mentioned before, the DHS is the DoD's principal partner in Homeland Defense. The DHS is tasked to: Prevent terrorist attacks in the U.S. Reduce U.S. vulnerability to terrorism And minimize damage from potential attacks/natural disasters 7 DHS Operational Components The Private Sector- The private sector is an umbrella term that may be applied in the United States and in foreign countries to the nonpublic or commercial individuals and businesses, specified nonprofit organizations, academia, and selected NGOs. Such organizations can be large and multinational or small with limited resources. The private sector can assist the U.S. Government by sharing information, identifying risks, performing vulnerability assessments, assisting in planning, and providing other assistance as appropriate. Private sector entities might only coordinate if such coordination supports their business model. In domestic operations, partnership between the public and private sectors is essential, in part because the private sector owns and/or operates a great majority of the nation’s critical infrastructure. Protection of it is a shared responsibility among federal, state, local, and tribal governments and the owners and operators of this infrastructure. Structures in Homeland Defense- The DoD has a structured approach to homeland security that includes coordination with multiple internal agencies. The Pentagon's National Military Command Center is DoD's principal command and control structure for homeland defense, and is closely integrated with the DHS National Operations Center. SecDef executes Homeland Defense operations through geographic and functional combatant commanders, who direct military forces operating under Title 10 U.S. Code. NORAD is organized in three regions covering Alaska, Canada and continental U.S., with established procedures for aerospace warning, aerospace control and maritime warning. Homeland Defense beyond these three missions is national responsibilities.
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