The USS Liberty - What Every American Must Know

On June 8, 1967 Israeli planes and torpedo boats attacked an unarmed U.S. Navy research ship, the USS Liberty, in the Mediterranean Sea near the Sinai Peninsula. http://www.gtr5.com/ Over fifty years later, the NSA continues to keep the details of this attack secret.
https://theintercept.com/2017/06/06/fifty-years-later-nsa-keeps-details-of-israels-uss-liberty-attack-secret/
Why the secrecy? Where's the outrage from the U.S. government?

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