https://www.axios.com/trumps-homeland-security-nominee-the-wall-isnt-enough-1513299926-153d812d-9bd0-49eb-bbe7-8c649a0fcbb5.html
Justin Green Jan 10, 2017
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Trump's Homeland Security nominee: The wall isn't enough
No physical structure will accomplish the mission on its own ... Security of the border starts 1,500 miles south of the Rio Grande in the jungles of Latin America. — Gen. John Kelly