On June 8, 1967, during the Six Day War, the intelligence ship USS Liberty was attacked off the Sinai Peninsula. The unprovoked assault came first from jets, then torpedo boats, all of which were unmarked. Virtually unique among such cases, the incident has never been formally investigated by Congress. HISTORY UNDERCOVER® goes where the government won't with this unblinking look at the event that strained US-Israeli relations. We'll hear from survivors of the attack about what it was like onboard the Liberty, and the disbelief the crew felt when they realized that their anonymous assailants were their alleged allies. We'll look for signs of a cover-up in a thorough analysis of the public statements made by both the US and Israeli governments. And we'll examine the leading theories put forth to explain the motive behind the attack.