A look at the ‘knife bomb’ that may have killed al-Qaida leader (2024)

WASHINGTON (AP) — For a year, U.S. officials have been saying that taking out a terrorist threat in Afghanistan with no American troops on the ground would be difficult but not impossible. Last weekend, the U.S. did just that — killing al-Qaida leader Ayman al-Zawahri with a CIA drone strike.

Other high-profile airstrikes in the past had inadvertently killed innocent civilians. In this case, the U.S. carefully chose to use a type of Hellfire missile that greatly minimized the chance of other casualties. Although U.S. officials have not publicly confirmed which variant of the Hellfire was used, experts and others familiar with counterterrorism operations said a likely option was the highly secretive Hellfire R9X — know by various nicknames, including the “knife bomb” or the “flying Ginsu.”

That potential use of the R9X, said Klon Kitchen, senior fellow at the American Enterprise Institute and a former intelligence analyst, suggests the U.S. wanted to kill al-Zawahri with “limited likelihood of collateral death and destruction and for other relevant political reasons.”

A look at the Hellfire, and how al-Zawahri likely was killed:

What is a Hellfire missile?

Originally designed as an anti-tank missile in the 1980s, the Hellfire has been used by military and intelligence agencies over the last two decades to strike targets in Iraq, Afghanistan, Yemen and elsewhere.

The precision-guided missiles can be mounted on helicopters and unmanned drones and are used widely in combat around the world. More than 100,000 Hellfire missiles have been sold to the U.S. and other countries, according to Ryan Brobst, an analyst at the Foundation for the Defense of Democracies, a Washington think tank.

“It can do enough damage to destroy most targets such as vehicles and buildings while not doing enough damage to level city blocks and cause significant civilian casualties,” Brobst said.

The U.S. military has routinely used Hellfire missiles to kill high-value targets, including a senior al-Qaida leader in Syria last year, and al-Qaida propagandist Anwar al-Awlaki in Yemen in 2011.

What killed al-Zawahri?

The U.S. had multiple options for the attack. It could have used a traditional Hellfire, a bomb dropped from an manned aircraft, or a far more risky assault by ground forces. U.S. Navy SEALs, for example, flew into Pakistan on helicopters and took out Osama bin Laden in a raid.

In this case, the CIA opted for a drone strike. And while the CIA generally doesn’t confirm its counterterrorism missions and closely guards information about strikes it conducts, U.S. government officials have said that two Hellfire missiles were fired at the balcony of the building where al-Zawahri was living in Kabul.

Online images of the building show damage to the balcony, where the U.S. says al-Zawahri was, but the rest of the house is standing and not badly damaged.

Unlike other models of the Hellfire, the R9X doesn’t carry an explosive payload. Instead, it has a series of six rotating blades that emerge on its final approach to a target, Kitchen said. “One of their utilities is in opening up vehicles and other obstructions to get to the target without having to use an explosive warhead,” he said.

Avoiding civilian deaths

U.S. officials and experts made clear this week that avoiding civilian casualties was a crucial element in the choice of weapon.

Less than a year ago, a U.S. drone strike — using a more conventional Hellfire missile — struck a white Toyota Corolla sedan in a Kabul neighborhood and killed 10 civilians around and near the car, including seven children. In the midst of the chaotic U.S. military withdrawal from Afghanistan, American forces believed there were explosives in the car and that it posed an imminent threat to troops on the ground. It was, military leaders said, a “tragic mistake”

One former U.S. official said the likely choice of an R9X is an example of the administration’s effort to find ways to minimize collateral damage and prevent the loss of innocent life. That missile is a very accurate weapon that strikes in a very small area, said the official, who spoke on condition of anonymity to discuss counterterrorism operations.

An administration official said Monday that the U.S. investigated the construction of the house where al-Zawahri was staying in order to ensure that the operation could be done without threatening the structural integrity of the building and also minimizing the risks of killing civilians, including members of his family who were in other parts of the house.

The choice of missile is ultimately one part of reducing the possibility of killing civilians or causing other collateral damage.

“I would say this is by far a lower-risk option,” said Tom Karako, an expert on missile defense at the Washington-based Center for Strategic and International Studies. Using the Hellfire, he said, “reflects a high degree of caution as opposed to a riskiness.”

Is the US providing Ukraine with drones that shoot Hellfire missiles?

No. While the U.S. has delivered billions of dollars in military assistance to help Ukraine fight the invading Russian troops, it is wary of providing weapons that could fire deep into Russia, potentially escalating the conflict or drawing the U.S. into the war.

As a result, the U.S. so far has not provided Hellfire missiles or drones that could fire them. Instead, the U.S. has delivered smaller, so-called kamikaze drones, such as the Switchblade and Phoenix Ghost, which instead of firing missiles, explode when they hit a target.

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