CNN has confirmed that the bomb that killed 40 children when it struck their school bus in Yemen’s northern city of Saada was made by the U.S. weapons manufacturer Lockheed Martin and sold by the United States to Saudi Arabia. The August 9 airstrike has sparked widespread outrage and increased scrutiny about the U.S. role in the Saudi-led war in Yemen. The bomb, a laser-guided MK 82, is similar to other U.S.-manufactured bombs that struck a Yemeni market, killing 97 people, and a funeral home in Sana’a, killing 155 people, in 2016. Following the funeral home massacre, the Obama administration banned the sale of precision-guided military technology to Saudi Arabia. The Trump administration overturned the ban last year. Click here to see our full coverage of the August 9 bombing of the school bus in Yemen, which killed 51 people—40 of them children.