You remember al-Qaida, yes? That was the terrorist cabal that hurled the United States into a global war on 9/11. It’s a new form of worldwide conflict.

In recent years our attention has been riveted on the Islamic State, which emerged as Public Enemy No. 1 in that ongoing war.

ISIS has produced its share of public figures who’ve taunted the rest of the world. Perhaps the most notable of them was a British national nicknamed “Jihadi John,” who beheaded prisoners. Jihadi John got his, though, in a missile strike that took him out in 2016.

Here is some more good news: The U.S. military, working with Libyan forces, has killed a key al-Qaida leader in another strike. Musa Abu Dawud was one of two key militant leaders to get blown to bits in a strike in Libya.

Now, before we start our end zone dance and high-five each other, I would like to remind us all of an irrefutable truth in this war: We will need to kill every single terrorist if we have any hope of ending this threat. In other words, although an al-Qaida leader has been smoked, another one — or more — is likely to emerge to replace him.

Donald Trump once told us knew knows “more about ISIS than the generals.” OK, but there must be continued pressure put on the original top enemy, al-Qaida. That organization has continued to wage terror campaigns even though its leader, Osama bin Laden, died in that U.S. commando raid in May 2011.

This is my way of reminding us about the nature of this war against terror. There likely is no way we can declare victory the way we did in World War II, when the world put down the forces of tyranny emanating from Berlin, Rome and Tokyo.

We aren’t fighting military forces that march under the banner of a nation or even a group of nations. We are fighting shady, cunning and creative terrorists who lurk in darkness before striking out.

The president vows to continue the fight, bringing the full weight of our immense military power to bear against terrorists, whether they represent ISIS, al-Qaida, Boko Haram or any sinister organization that seeks to do us harm.

May the fight go on … for as long as it takes.