boarder / coastal security

Only need 350 words total but need citations from internet articles or news, include link I can look up.

Explain the concept of Open Markets and Closed Borders.

1) The United States Government is striving to have an open, but secure border. What would be the consequences/impact to the United States if the border was suddenly made less open and more secure?

2) Should the "need to know" be replaced by the "need to share" as stated in the 9/11 Commission Report? Why or why not? Fully explain your position.

3) What is the role of the Department of Defense in border and coastal security? What is the DOD's relationship with the Department of Homeland Security as it pertains to border security? How does DOD support civil authorities?