http://www.ussliberty.org/report/report.htm
"Washington, June 10, 1967.
The Secretary of State presents his compliments to His Excellency the Ambassador of Israel and has the honor to refer to the Ambassador's Note of June 10, 1967 concerning the attack by Israeli aircraft and torpedo boats on the United States naval vessel U.S.S. Liberty,
. . .
In these circumstances, the later military attack by Israeli aircraft on the U.S.S. Liberty is quite literally incomprehensible. As a minimum, the attack must be condemned as an act of military recklessness reflecting wanton disregard for human life.
The subsequent attack by Israeli torpedo boats, substantially after the vessel was or should have been identified by Israeli military forces, manifests the same reckless disregard for human life. . . . The U.S.S. Liberty was peacefully engaged, posed no threat whatsoever to the torpedo boats, and obviously carried no armament affording it a combat capability. It could and should have been scrutinized visually at close range before torpedoes were fired.
. . . the Secretary of State wishes to make clear that the United States Government expects the Government of Israel also to take the disciplinary measures which international law requires in the event of wrongful conduct by the military personnel of a State."
There has been no statement in the last thirty-eight years by the United States government reversing or amending this formal position.
The Israeli Defense Forces Chief Military Prosecutor, immediately following the attack, filed formal charges recommending court martial proceedings against a number of Israeli military personnel.[36] The examining judge disagreed with United States position that the attack.
As a result of this blanket absolution, no one in the Israeli government or military has received so much as a reprimand for their involvement in the attack,[38] much less the punishment demanded by the United States ("the United States Government expects the Government of Israel also to take the disciplinary measures which international law requires in the event of wrongful conduct by the military personnel of a State").
yeah i am not coming out and claiming something i cannot prove but it is my personal belief that the attack was deliberate.