It didn’t happen in 2016, after a Saudi jet had dropped American-made bombs on a funeral in the Yemeni capital, Sanaa, killing more than 140 people.

It didn’t happen in 2018, after a Saudi jet hit a Yemeni school bus with an American-made bomb, killing 44 boys on a field trip.

But on Thursday, nearly six years after Saudi Arabia and its Arab allies launched a punishing military intervention in the Arab world’s poorest country, U.S. President Joe Biden announced that he was ending American support for the Saudi-led war in Yemen, including some arms sales.