Israel's deadly attack on USS Liberty emerges from the past (VIDEO)

Before Israeli commandos shot 9 peace activists to death aboard the Mavi Marmara, 34 American military men were killed by Israeli jet fighter planes. 

It happened in 1967 during the 6 day war and it became an event these men and women would live with for the rest of their lives.

For 40 years survivors of the USS Liberty -- sworn under oath -- were forbidden to tell their stories. 

But today, the surviving crewmen talk candidly about the dreadful day their nearly lost their lives.

They gathered at the Arlington National Cemetery for the somber memorial service.