MORE THAN a dozen years after the attacks of 9/11, it is time to treat government decisions made in the aftermath as history — to be debated and learned from. This is especially true of the misguided program of interrogation and torture carried out by the Central Intelligence Agency. In the years after the attacks, so-called “enhanced interrogation techniques” that did not measure up to American values nor international law were brought to bear on detainees. We need to know the full story of how that happened.

In a landmark investigation, comparable in significance to the 9/11 Commission report, the Senate Select Committee on Intelligence initiated a full probe of the interrogations in 2009. The investigation was completed in December 2012 and approved by a 9 to 6 vote. The resulting report is roughly 6,300 pages long, with a 300-page executive summary. The CIA, which is the focus of much criticism in the report, submitted a 120-page response to the committee in June, explaining where the agency agreed with the findings and where it disagreed. A long period of discussion between the CIA and committee staff ensued, concluding last September. Since then, the report has been under revision to reflect the comments.

When complete, the full report will go back to the committee for approval and then, perhaps, to the executive branch for declassification. We hope this happens soon. The committee chairwoman, Sen. Dianne Feinstein (D-Calif.), has called for the release of a declassified executive summary and of the findings and conclusions. President Obama, who early in his first term repudiated the legal memos that were used as justification for the interrogations but also announced that he would not seek criminal charges against CIA operatives who participated in the them, has endorsed making public a declassified version.

Clearly, this has been a painful process for the CIA. The report is expected to be highly critical of the agency’s actions. A key issue is whether methods such as waterboarding produced any useful intelligence, as members of the Bush administration and others have claimed. A debate without the facts is hollow. We need to read the report of the Senate committee in order to squarely address it.

There have been some reports in recent days of an investigation by the CIA’s inspector general into whether agents gained access to Senate committee computers, perhaps an effort to interfere with the report’s publication. If this happened, this is terribly inappropriate. The CIA must cooperate with Congress in getting this report published, however unpleasant that may be.

The interrogation methods were part of a covert action program authorized by the president. It is time to examine the program with some historical perspective, learn the lessons and ponder how the United States can best defend itself in a dangerous world without violating dearly held values and principles.