What are some of the challenges the intelligence community faces in supporting the Homeland Security enterprise (such as the balance of civil liberties and security)?

What are some of the challenges the intelligence community faces in supporting the Homeland Security enterprise (such as the balance of civil liberties and security)? 

Provide evidence from the weekly readings to support your arguments via Turabian parenthetical citations. 
Other sources (if used at all) must be subordinate to your understanding of the readings presented in the class.
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