It’s easy to forget the ongoing war in Yemen. But a pair of news stories this week serves not only of a reminder of American involvement there but the foolishness in involving ourselves in yet another civil war.

The first story is the bombing of a school bus by Saudi warplanes that killed 29 children under the age of 15 in Saada Province. For what it’s worth (which isn’t much), the Saudis claim they didn’t intentionally target a bus full of children and that this was a “legitimate military operation.” Civil wars are usually full of atrocities, but this particular horror and the 29 dead children (and many others in this war) was made possible by generous assistance from the United States government and American taxpayers.

Yes, these were Saudi pilots flying Saudi planes (probably — this particular atrocity is credited to the “Saudi-led coalition”), but those planes and the bombs they dropped were sold to them by the United States. Now, you can argue that a seller has no moral responsibility for the atrocities committed when they provide weapons to a bestial regime. So be it, but American involvement doesn’t end when the check is cashed.