The money that bin Laden inherited was about 20 million dollars over the course of many years, not the much larger sums some have suggested. In 1994, his family cut him off.

Because 9/11 was carried out by 19 foreign-born Arab hijackers, many assume that all terrorists who attack the West are foreigners.

ISIS is even at war with its most natural ally, al Qaeda in Syria.

Occasionally, Donald Trump says something that is politically incorrect but which also happens to be true.

My quest to meet Osama bin Laden began in North London early in 1997. In the Dollis Hill section, I contacted Khaled al-Fauwaz, the spokesman for a Saudi opposition group, the Advice and Reformation Committee, which bin Laden had founded.

Trump has claimed he knows more about ISIS than America's leading generals. Clearly, this is also total nonsense; he doesn't seem to have done the slightest thing to educate himself about ISIS.

McMaster, 54, is the smartest and most capable military officer of his generation, one who has not only led American victories on the battlefields of the 1991 Gulf War and of the Iraq War, but also holds a Ph.D. in history.

Mateen pledged allegiance to ISIS during his attack, the worst terror attack on American soil since 9/11.

What did U.S. officials have to lose by saying that bin Laden was being protected by the Pakistanis, if it were true?

The special reverence that al Qaeda had for Sheikh Rahman was underlined by a two-hour propaganda videotape that the group's media division released in the spring of 2001, when the 9/11 attacks were in their final planning phase.

The United States didn't ban Italian immigration in the 1920s because a small minority of Italians became members of the Mafia, and the country is a richer place for it.

In picking Gen. Jim Mattis for Defense secretary, President-elect Donald Trump has said that he found his 'Gen. George Patton.' Yet that label may not really capture what makes Mattis a distinctive choice.

As Michael Scheuer, who ran the C.I.A.'s bin Laden unit until 1999, has pointed out, if bin Laden believed in Christmas, the Iraq war would be his perfect present from Santa Claus. The 9/11 attacks and the subsequent war in Afghanistan severely damaged bin Laden's organization.

In quiet ways far too complex to hold Trump's interest, Muslims in the United States and around the world are helping every day to prevent massacres such as Orlando from happening.

In the past, Joint Special Operations Command, or JSOC, of which SEAL Team 6 is a key component, has only launched ground raids in Yemen when the lives of hostages held by al Qaeda seemed at risk.

Keeping a relatively small, predominantly U.S. Special Forces presence in Afghanistan to continue to train the Afghan army past December 2016 is a wise policy that would benefit both Afghans and Americans.

Bush administration officials, of course, deny that they didn't take the threat urgently enough, but there is no debating that in their public utterances, private meetings, and actions, the al Qaeda threat barely registered.

Bin Laden studied economics and public administration before he turned to a life of jihad.

When Abu Zubaydah was shown a series of photos of al Qaeda members by Soufan, he identified one of them as the operational commander of 9/11, Khalid Sheikh Mohammed.

The only lethal terrorist to immigrate to the United States as an adult and conduct an attack shortly after arriving is Tashfeen Malik, who was born in Pakistan.

Abu Musab al-Suri is someone I got to know pretty well because he's a Syrian. Very bright guy, lived in London. He actually was the person who took myself and correspondent Peter Arnett and the cameraman, Peter Juvenal, to interview bin Laden for his first TV interview.

President-elect Donald Trump has a host of national security challenges to deal with as he assumes office, from the resurgence of the Taliban in Afghanistan to the grinding Syrian civil war to the flexing of Russian muscles under President Vladimir Putin to how to deal with ISIS as the terrorist army retreats in Iraq.

The E.U. is the latest of a series of multinational organizations set up after World War II to ensure that there would never again be a pan-European war and to create the conditions for a new European prosperity after the destruction wrought by the war against the Nazis. The E.U. has admirably succeeded at both.

Because Scotland and Northern Ireland want to remain part of the E.U., there is the quite real possibility that Scotland and even Northern Ireland might now choose to go their own way on membership within the E.U. and the 'United Kingdom' would suddenly effectively be only England and Wales.

American jihadists are generally motivated by a mix of factors, including dislike of U.S. foreign policy in the Muslim world.

For many, embracing the ideology of Osama bin Laden or ISIS allowed them to become the heroes of their own story as well as actors in a cosmic crusade. For others, a 'cognitive opening' to militant Islam was often precipitated by a personal disappointment or loss.

Since Trump is not quick to forgive the merest of slights, it's hard to imagine him calling on any of the officials who have publicly taken a stand against him to serve in key national security slots.

Trump has long been a fan of Vladimir Putin but seems to be unaware that Russia's goal in Syria is simply the maintenance of its longtime ally President Bashar al-Assad in power. Indeed, Moscow has hitherto shown little appetite to focus on ISIS.

The reality is that Trump's focus on immigrants is to misconceive of the terrorist problem that exists in the United States.

Every lethal terrorist attack in the United States since 9/11 has been carried out by an American citizen or a legal permanent resident, not by recent immigrants or by refugees. So tamping down immigration won't fix the real issue, which is 'homegrown' terrorism.

Syrian dictator Bashar al-Assad belongs to the small Alawite sect and is therefore considered a heretic by many Sunnis; al-Assad runs a secular regime, and therefore he is considered by Sunni militants to be an apostate, and he is inflicting a total war on his Sunni population.

Syria is attracting a lot more Westerners than the Iraq War ever did because it's the perfect Sunni jihad.

A key flaw of the Obama administration's approach to Afghanistan has been constantly announcing proposed withdrawal dates for U.S. forces, which has enabled the Taliban to believe they can simply wait out the clock.

In short, the hunt for bin Laden could not have been accomplished without every form of American intelligence-gathering.

'Zero Dark Thirty' is a great piece of filmmaking and does a valuable public service by raising difficult questions most Hollywood movies shy away from, but as of this writing, it seems that one of its central themes - that torture was instrumental to tracking down bin Laden - is not supported by the facts.

While the story about the hunt for bin Laden has been exhaustively reported and the key sources and witnesses are in agreement about the main points of the narrative, of course, it's still possible that we could learn new details about the story that would add to the narrative.

During the campaign, Trump in many ways repudiated President Obama's national security and foreign policy approach on issues like the Iran nuclear deal and immigration. So there's a real question of continuity or disruption with Trump, which wouldn't have existed if Clinton was president-elect.

There is considerable merit to the notion of treating gun violence as a public health matter.

Americans generally regard themselves as belonging to an exceptional nation. And in terms of living in a religiously tolerant and enormously diverse country, Americans can certainly take some justified pride.

Today, we are not likely to need to organize local militias for our defense now we have something called the Pentagon.

Like the attack on Pearl Harbor, another hinge event in American history, 9/11 was a great tactical victory for America's enemies. But in both these cases, the tactical success of the attacks was not matched by strategic victories. Quite the reverse.

When Congress passed the Authorization for the Use of Military Force immediately after the 9/11 attacks, no one could have imagined this authorization would continue to be the basis for American wars that persist a decade and a half later.

One only has to look at the debacle that has unfolded in Iraq after the withdrawal of U.S. troops at the end of 2011 to have a sneak preview of what could take place in an Afghanistan without some kind of residual American presence.

The Obama administration has framed its defense of the controversial bulk collection of all American phone records as necessary to prevent a future 9/11.

Pakistan's key leaders have succumbed to the assassin's bullet or bomb or the hangman's noose, and the country has seen four military coups since its birth in 1947. Yet the Pakistani polity has limped on.

The Bush administration's approach to the war on terror collided badly with another of its doctrines, spreading democracy in the Middle East as a panacea to reduce radicalism.

Imprisoned by its war on terror framework, the Bush administration supported Israel in a disastrous war against Hezbollah in Lebanon in the summer of 2006.

The dirty little secret of the intelligence world is that much of what you really need to know isn't exactly a secret anyway.

The less the ISIS 'caliphate' exists as a physical entity, the less the group can claim it is the 'Islamic State' that it purports to be.

Nothing is more powerful than hearing from former members of the group that ISIS is not creating an Islamist utopia in the areas it controls, but a hell on earth.