Did the USS Liberty pay the price of intercepting what can be considered an evidence of a war crime against the Egyptian POWs in Al-Arish ??
The USS Liberty was attacked and damaged by the IAF and Israeli Navy on the 8th of June 1967, the American intelligence ship was in the international waters about 23 km from the coast of Sinai , north of Al-Arish. 
It was targeted by the Israeli fighter planes by the Napalm bombs and the torpedo boats
The attack killed 34 U.S service men and wounded at least 173; it was the first deadliest attack against a U.S warship since the World War II and the second deadliest attack after the attack on the USS Stark in 1986 during in the Iraq-Iran war
The Israeli justification that was accepted by the American government then that it was a friendly fire mistake issue, as the IDF identified by mistake as they officially claimed the USS liberty was the Egyptian vessel “El-Quseir”.
There were American and Israeli investigations there were held then to reach the conclusion it was a friendly fire and due to the American-Israeli relations and the powers of the Jewish lobby in America, it was accepted, despite the fact that till now this conclusion is and was challenged by the crew members who survived and some of the former U.S officials like the former C.I.A director then Richard Helms”1” :
The board of inquiry (concluded) that the Israelis knew exactly what they were doing in attacking the Liberty
, the secretary of state then Dean Rusk ”2”:
I was never satisfied with the Israeli explanation. . . . Through diplomatic channels we refused to accept their explanations. I didn’t believe them then, and I don’t believe them to this day. The attack was outrageous.
And Admiral Thomas Moore ”3” ; whom will be mentioned later in this report.
To suggest that they “IDF” could identify the ship is…ridiculous…Anybody who could not identify the Liberty could not tell the difference between the white house and the Washington monument
Already the first point of debate was that the USS Liberty couldn’t be mistaken for the Egyptian vessel “El-Quseir” as Liberty was more than twice as large as “El-Quseir”, Liberty was a technical research ship while El-Quseir was a vessel, I could not find till now the specification of the Egyptian vessel but from reading the specification of Liberty I can see the huge difference between both watercrafts, it can be noticed from the sky above.
Another important point was the letters written on the ship, USS Liberty was clearly designated with Latin letters not Arabic letters like in case of El-Quseir and Egyptian warships then.
And of course the flag, beside the numbers and letters USS Liberty had three big American flags on it that could be seen very well and 
there was and is a great difference between the American flag and the old Egyptian flag during the 1960s!!
The debate even reached to the head of the U.S navy court of inquiry Admiral Isaac Kidd and the court’s legal counsel captain Ward Boston believed then it was deliberate act from the Israeli side to kill the entire crew of the ship but Kid was forced and ordered by the American government to falsify the report “check Ward’s declaration in the 8th of January 2004”
On December 17th 1987, the Liberty incident file was officially closed between Israel and America, Israel paid nearly 13 millions $ as compensation to the families of the victims in a very a rare situation
But the file was not closed unofficially because the crew members and victims families wanted to know the truth , because they knew it wasn’t a mistake they didn’t shut up with the 13 million$ ,on the contrary each year there is a new book or research about the USS liberty and what really happened to it and why
Why it is related to our main subject here, well the one must himself why would Israel bomb American warship, intelligence warship to be specific if this warship didn’t intercept what the IDF considered dangerous, something the world should not know??
Of course theories of why Israel had bombed the American intelligence ship didn’t stop in fact we found very interesting theories that go beyond our imagination for example that it was bombed because Israel didn’t want America to know that it started its invasion to the Syrian Golan, already I don’t how it didn’t want America to know so, if the start of the clash or war was the tension on the Syrian borders, another crazy theory saying that President Johnson was planning with Israel to engage in the war by attacking Egypt as she will be accused for destroying Liberty as the plan was that Israel would go and sink Liberty and Egypt were to be accused , but the heavens had other plans as the attack didn’t sink it and it survived with its crew for two complete hours despite the huge damage , nice theory but I don’t think America was ready then to open another WWIII with the Soviet Union especially and it was stuck in the Vietnamese war
Check out this interview made by Daryl Bradford Smith in 2006 with former US Officer James Ennes about the American warship that was targeted by Israel in 1967,this interview was conducted on the 1st of November 2006.