Basically, <u>two important changes were introduced to the definition of homeland security in 2010</u>. <u>First one</u> was about <em><u>Nation’s homeland security missions. </u></em>These missions are enterprise-wide, and not limited to the Department of Homeland Security. Federal Government, State, local, tribal, and territorial governments, the private sector, and other non-governmental organizations are responsible for executing these missions. The homeland security professionals must have a clear sense of what it takes to achieve this vision. <u>The second change</u> was about <em><u>three key and essential concepts for a comprehensive approach to homeland security: Security, Resilience and Customs and Exchange</u></em>.
