US nuclear deterrent patrols the world’s oceans l ABC News

US nuclear deterrent patrols the world’s oceans l ABC News

Martha Raddatz reports on board a U.S. Navy ballistic missile submarine and explores how the most destructive warships ever built are helping keep Americans safe on “This Week.” SUBSCRIBE to ABC News: https://bit.ly/2vZb6yP WATCH MORE on http://abcnews.go.com/ LIKE ABC News…

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