"The documents also suggest that the U.S. government, anxious to spare Israel's reputation and preserve its alliance with the U.S., closed the case with what even some of its participants now say was a hasty and seriously flawed investigation. In declassifying the most recent and largest batch of materials last June 8, the 40th anniversary of the attack, the NSA, this country's chief U.S. electronic-intelligence-gatherer and code-breaker, acknowledged that the attack had "become the center of considerable controversy and debate." It was not the agency's intention, it said, "to prove or disprove any one set of conclusions, many of which can be drawn from a thorough review of this material," available athttp://www.nsa.gov/liberty ."