In July, after approval from the Obama administration, Congress released a 28-page chapter of previously classified material from the final report of a joint congressional inquiry into the Sept. 11 attacks. Saudi Arabia's foreign minister, Adel al-Jubeir, said that the document had ruled out any Saudi involvement in the attack. "The matter is now finished," he declared.
But it is not finished. Questions about whether the Saudi government assisted the terrorists remain unanswered. Now, as we pass the 15th anniversary of the most heinous attack on the United States since Pearl Harbor, it is time for our government to release more documents from other investigations into Sept. 11 that have remained secret all these years.
The recently released 28 pages were written in the fall of 2002 by a committee of which I was a co-chairman. That chapter focused on three of the 19 hijackers who lived for a time in Los Angeles and San Diego. The pages suggested new trails of inquiry worth following, including why an al-Qaida operative had the unlisted phone number for the company that managed the Colorado estate of Prince Bandar bin Sultan, then the Saudi ambassador.
Some of those questions might be answered if the government released more of the findings of the Sept. 11 commission, the citizens inquiry that followed our congressional inquest. The commission said that it found no Saudi links to the hijackers. But it could satisfy lingering doubts by releasing more of its records. Parallel investigations were also conducted by the FBI and CIA. How much did they look into whether Bandar or other Saudis aided the hijackers?
The government also knows more today about the 16 hijackers who lived outside California than when the 28 pages were classified in 2003. Much of that information remains secret but should be made public. For example, the FBI for a time claimed that it had found no ties between three of the hijackers, including their leader, Mohamed Atta, and a prominent Saudi family that lived in Sarasota before Sept. 11. The family returned to the kingdom about two weeks before the attack. But in 2013, a Freedom of Information Act lawsuit brought by investigative reporters led to the release of about 30 pages from an FBI-led investigation that included an agent's report asserting "many connections" between the hijackers and this family. The FBI said the agent's claim was unfounded, and the family said it had no ties to the hijackers. Still, a federal judge in 2014 ordered the bureau to turn over an additional 80,000 pages from its investigation, and he is reviewing those for possible public release.
There is one more thing our government could do to shed light on the attack. For more than a decade, the families of Sept. 11 victims have been litigating against the kingdom and Saudi interests, asserting that they facilitated the murder of their loved ones. With the support of the Justice Department, the Saudis used a 1976 law providing foreign nations some immunity from American lawsuits to block those efforts to secure justice. Now, both the Senate and House have unanimously passed a bill, the Justice Against Sponsors of Terrorism Act, that would allow a thorough judicial examination of the Saudi role.
Some might ask, 15 years later, what difference does all this make?
In fact, a lot. It can mean justice for the families that have suffered so grievously. It can also mean improving our national security, which has been compromised by the extreme form of Islam that has been promoted by Saudi Arabia.
But the most important reason is to avoid the corrosive effect that government secrecy can have on a democracy. The nation that denies its people information about what it is doing in their name is a nation slogging down a dark alley of public suspicion toward decline and mediocrity. As Daniel Patrick Moynihan put it, "Secrecy is for losers."
The government's possible suppression of evidence of Saudi support for the 19 hijackers would go beyond passive coverup. Is the government releasing false information, while continuing to classify documents containing the truth? As the presidential campaign is proving, appearances of government deception have contributed to wary Americans becoming more and more outraged with their elected officials.
In recognition of another anniversary, 45 years since the publication of the Pentagon Papers, Sanford Ungar, who teaches seminars on free speech at Georgetown and Harvard, said: "Nothing is more important to the health and sustainability of a modern democracy than its citizens' awareness of, and confidence in, what their government is doing. Excessive government secrecy — inherent, instinctive, utterly unnecessary and often bureaucratically self-protective — is poison to the well-being of civil society."
I care deeply about our nation's future, its tradition of openness and the necessity of honesty in our international relations. President Barack Obama has less than five months remaining in his term. I commend him for his decision to authorize the release of the 28 pages. He should sign the Justice Against Sponsors of Terrorism Act and use his authority to direct the release of all the chapters of the book of Sept. 11. And then our country must act based on the truths they may reveal.
Bob Graham, an author of "America: The Owner's Manual," was a Democratic senator from Florida from 1987 to 2005 and the chairman of the Intelligence Committee from 2001 to 2003. © 2016 New York Times