How Sept. 11 changed surveillance and security in US
A five-part docuseries, "9/11 Twenty Years Later: The Longest Shadow," takes a closer look at the long-term effects of the terror attacks. WATCH the ABC News Live Stream Here: https://www.youtube.com/watch?v=w_Ma8oQLmSM SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK https://ift.tt/1bxu5fI FOLLOW ABC News on TWITTER: https://twitter.com/abc
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