The New York Times reports:

When a Saudi F-15 warplane takes off from King Khalid air base in southern Saudi Arabia for a bombing run over Yemen, it is not just the plane and the bombs that are American.

American mechanics service the jet and carry out repairs on the ground. American technicians upgrade the targeting software and other classified technology, which Saudis are not allowed to touch. The pilot has likely been trained by the United States Air Force.

And at a flight operations room in the capital, Riyadh, Saudi commanders sit near American military officials who provide intelligence and tactical advice, mainly aimed at stopping the Saudis from killing Yemeni civilians.

American fingerprints are all over the air war in Yemen, where errant strikes by the Saudi-led coalition have killed more than 4,600 civilians, according to a monitoring group. In Washington, that toll has stoked impassioned debate about the pitfalls of America’s alliance with Saudi Arabia under Crown Prince Mohammed bin Salman, who relies on American support to keep his warplanes in the air.

Saudi Arabia entered the war in 2015, allying with the United Arab Emirates and a smattering of Yemeni factions with the goal of ousting the Iran-allied Houthi rebels from northern Yemen. Three years on, they have made little progress. At least 60,000 Yemenis have died in the war, and the country stands on the brink of a calamitous famine.

For American officials, the stalled war has become a strategic and moral quagmire. It has upended the assumptions behind the decades-old policy of selling powerful weapons to a wealthy ally that, until recently, rarely used them. It has raised questions about complicity in possible war crimes. And the civilian toll has posed a troubling dilemma: how to support Saudi allies while keeping the war’s excesses at arm’s length. [Continue reading…]