The weapon used in the Saudi-led coalition airstrike on a school bus in Yemen earlier this month that killed 51 people, 40 of them children, and wounded over 100 more was manufactured in the United States, CNN reported Friday night. The bomb in question was reportedly a 500-pound laser-guided MK 82 bomb produced by Lockheed Martin, an American defense contractor. It was identified from numbers on the shrapnel. The Saudi coalition, which has been credibly accused of war crimes in Yemen, is supported by the United States. The coalition promised to investigate itself for this attack.

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