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>.
The crusades from Europe believed that Jerusalem (the holy land) was theirs, while the Middle Eastern countries disagreed, leading to battles and attacks in the northern part of Jerusalem.
After the Louisiana territory was bought Louis and Clark explored it.
Ability to think outside of the box
To halt Soviet aggression by forming an alliance of nations