This presentation outlines the state of Homeland Defense in the United States: the security environment, Department of Defense roles and definitions, DoD education and training in the past and present, DoD personnel needs, and interagency education. In the current security environment, nation-state threats will continue, and transnational threats will be the most pressing, as terrorists will seek to: attack Americans at home and abroad, attack multiple targets simultaneously, and inflict mass casualties or cause mass panic. Improved intelligence will help mitigate uncertainty about the form and timing of attacks. Other security environment hazards include: geological, water, climatic, fire, and health and disease. Homeland security is a concerted National effort to prevent terrorist attacks within the United States, reduce the vulnerability of the U.S. to terrorism, and minimize the damage and assist in the recovery from terrorist attacks. In defining roles, the Department of Homeland Security is responsible for the homeland security of the United States. DHS also has responsibilities beyond the prevention of terrorism, including leading the U.S. Government response to mitigation and recovery of natural disasters, WMD attacks, and other emergencies. Other federal agencies, such as the FBI, also have critical roles in combating terrorism (e.g., FBI is responsible for terrorist crisis management in the U.S.) Homeland defense is the protection of U.S. sovereignty, territory, domestic population, & critical defense infrastructure against external threats and aggression or other threats as directed by the President. The Office of the Assistant Secretary of Defense will supervise Homeland Defense activities of the Department of Defense, develop policy and force employment guidance. He or she is the principle DoD representative on homeland matters to DHS and the Homeland Security Council staff. He or she also assists the Secretary of Defense to fulfill the DoD's role in homeland defense and civil support. Prior to 1986, DoD education and training remained service-specific/service-focused. Operation Desert Storm was the first major test to put the education lessons into operation. Victory demonstrated that the services and joint community were accomplishing the joint educational missions. The DoD needs educated professionals who: understand the competencies of the national security/homeland security/homeland defense communities; know how to think strategically about national security/homeland security/homeland defense and the interagency process in an ever-changing global landscape; and understand how to develop effective plans and carry them to fruition in an interagency process.