Some good news from the attempted car bombing in Times Square on May 1 is that—at the relatively small cost of disappointment to Broadway theater-goers—it teaches valuable lessons to help deal with Islamist terrorism. The bad news is that those lessons should already have been learned.  One such lesson has to do with intelligence gathering. Because our enemies in this struggle do not occupy a particular country or location, intelligence is our only tool for frustrating their plans and locating and targeting their leaders. But as was the case with Umar Faruk Abdulmutallab, who tried to detonate a bomb aboard an airplane over Detroit last Christmas Day, principal emphasis was placed on assuring that any statements Faisal Shahzad made could be used against him rather than simply designating him an unlawful enemy combatant and assuring that we obtained and exploited any information he had.  On Sunday, Attorney General Eric Holder said that in regard to terrorism investigations he supports "modifying" the Miranda law that requires law enforcement officials to inform suspects of their rights to silence and counsel. But his approach—extension of the "public safety exemption" to terror investigations—is both parsimonious and problematic. The public safety exemption allows a delay in Miranda warnings until an imminent threat to public safety—e.g., a loaded gun somewhere in a public place that might be found by a child—has been neutralized. In terror cases it is impossible to determine when all necessary intelligence, which in any event might not relate to an imminent threat, has been learned.  The World Trade Center after the 1993 bombing.  The lesson from our experience with Abdulmutallab, who stopped talking soon after he was advised of his rights and did not resume for weeks until his family could be flown here to persuade him to resume, should have been that intelligence gathering comes first. Yes, Shahzad, as we are told, continued to provide information even after he was advised of his rights, but that cooperation came in spite of and not because of his treatment as a conventional criminal defendant.  Moreover, once Shahzad cooperated, it made no more sense with him than it did with Abdulmutallab to publicize his cooperation and thereby warn those still at large to hide and destroy whatever evidence they could. The profligate disclosures in Shahzad's case, even to the point of describing his confession, could only hinder successful exploitation of whatever information he provided.  The Shahzad case provides a reminder of the permanent harm leaks of any kind can cause. An Associated Press story citing unnamed law enforcement sources reported that investigators were on the trail of a "courier" who had helped provide financing to Shahzad.  A courier would seem oddly out of place in the contemporary world where money can be transferred with the click of a mouse—that is, until one recalls that in 2006 the New York Times disclosed on its front page a highly classified government program for monitoring electronic international money transfers through what is known as the Swift system.  That monitoring violated no law but was leaked and reported as what an intelligence lawyer of my acquaintance referred to as "intelliporn"—intelligence information that is disclosed for no better reason than that it is fun to read about, and without regard for the harm it causes. Of course, terrorists around the world took note, and resorted to "couriers," making it much harder to trace terrorist financing.  In the hours immediately following the discovery and disarming of the car bomb, media outlets and public figures fell all over themselves to lay blame as far as possible from where it would ultimately be found. Secretary of Homeland Security Janet Napolitano suggested the incident was entirely isolated and directed her agency's personnel to stand down. New York Mayor Michael Bloomberg sportingly offered to wager a quarter on the proposition that the bomb was the work of a solitary lunatic, perhaps someone upset over passage of the health-care bill, and much merriment was had over how primitive the bomb had been and how doomed it was to fail.  This sort of reaction goes back much further than this administration. Consider the chain of events leading to the 1993 World Trade Center bombing and eventually 9/11.  In November 1990, Meir Kahane, a right-wing Israeli politician, was assassinated after delivering a speech at a Manhattan hotel by El-Sayid Nosair, quickly pigeonholed as a lone misfit whose failures at work had driven him over the edge. The material seized from his home lay largely unexamined in boxes until a truck bomb was detonated under the World Trade Center in 1993, when the perpetrators of that act announced that freeing Nosair from prison was one of their demands.  Authorities then examined the neglected boxes and found jihadi literature urging the attacks on Western civilization through a terror campaign that would include toppling tall buildings that were centers of finance and tourism. An amateur video of Kahane's speech the night he was assassinated revealed that one of the 1993 bombers, Mohammed Salameh, was present in the hall when Nosair committed his act, and the ensuing investigation disclosed that Nosair was supposed to have made his escape with the help of another, Mahmoud Abouhalima, who was waiting outside at the wheel of a cab.  Nosair jumped into the wrong cab and the terrified driver pulled over and ducked under the dashboard, at which point Nosair tried to flee on foot and was captured. Salameh was captured when the vehicle identification number on the truck that carried the bomb led investigators to a rental agency, where he showed up days later to try to retrieve the deposit on the truck so that he could finance his escape.  Despite the toll from the first World Trade Center blast—six killed, hundreds injured, tens of millions of dollars in damage—and the murder of Kahane, much sport was made of how inept the perpetrators were.  Nosair and the 1993 Trade Center bombers were disciples of cleric Omar Abdel Rahman, known as the "blind sheikh," who was tried and convicted in 1995 along with nine others for conspiring to wage a war of urban terror that included not only that bombing and the Kahane assassination but also a plot to bomb simultaneously the Holland and Lincoln Tunnels, the George Washington Bridge and the United Nations.  One of the unindicted co-conspirators in that case was a then-obscure Osama bin Laden, who would declare in 1996 and again in 1998 that militant Islamists were at war with the United States. In 1998, his organization, al Qaeda, arranged the near-simultaneous bombing of American Embassies in Kenya and Tanzania.  Despite the declaration of war and the act of war, the criminal law paradigm continued to define our response. Along with immediate perpetrators, and some remote perpetrators including Khalid Sheikh Mohammed, bin Laden was indicted, and the oft-repeated vow to "bring them to justice" was repeated. Unmoved, and certainly undeterred, bin Laden in 2000 unleashed the attack in Yemen on the destroyer USS Cole, killing 17.  That was followed by Sept. 11, 2001, and it appeared for a time that Islamist fanaticism would no longer be greeted with condescending mockery. To the phrase "bring them to justice" was added "bring justice to them." The country appeared ready to adopt a stance of war, and to be ready to treat terrorists as it had the German saboteurs who landed off Long Island and Florida in 1942—as unlawful combatants under the laws of war who were not entitled to the guarantees that the Constitution grants to ordinary criminals.  There have been more than 20 Islamist terrorist plots aimed at this country since 9/11, including the deadly shooting by U.S. Army Maj. Nidal Hasan, those of Abdulmutallab and Shahzad, and those of Najibullah Zazi and his cohorts, Bryant Neal Vinas and his, against commuter railroads and subways in New York; of plotters who targeted military personnel at Fort Dix, N.J., Quantico, Va., and Goose Creek, S.C., and who murdered an Army recruiter in Little Rock, Ark.; of those who planned to blow up synagogues in New York, an office building in Dallas, and a courthouse in Illinois, among others.  Yet the pre-9/11 criminal law paradigm is again setting the limit of Attorney General Holder's response, even to the point of considering the inapposite public safety exception to Miranda as a way to help intelligence gathering. He continues to press for a civilian trial for Khalid Sheikh Mohammed and others who had long since been scheduled to be tried before military commissions.  A significant lesson lurking in Shahzad's inadequacy, and the history that preceded it, is that one of the things terrorists do is persist. Ramzi Yousef's shortcomings in the first attempt to blow up the World Trade Center were made up for by Khalid Sheikh Mohammed. We should see to the good order of our institutions and our attitudes before someone tries to make up for Faisal Shahzad's shortcomings.  Mr. Mukasey was attorney general of the United States from 2007 to 2009.
Former Attorney General Michael Mukasey writes in The Wall Street Journal that in the 1990s we mocked the ineptness of jihadists and were confident civilian courts could handle them. Look where that got us.