https://thehill.com/policy/defense/...di-arabia-gave-al-qaeda-american-made-weapons So now the Saudi Arabia is turning to jihadist groups in Yemen to fight the Houthi militias. Like they did in Syria against Assad. The US strongly backs the Saudi-led intervention and blockade, providing the coalition with targeting intelligence and tens of billions of dollars in weapons. The coalition has been using siege warfare tactics to defeat the Houthis. Bombing civilian targets and blocking food and medicine from entering the country. More than 80,000 people have been killed and millions are on the brink of famine. The UN labeled Yemen as "the world's worst humanitarian crisis."
AQ in Yemen came from Afghanistan over 20 years ago. And that's why KSA moved all their Saudi villages back 20 kilometers from the Yemen border in 2000.