This 14 December 2018 video from the USA says about itself:
And why they want more.
Saudi Arabia and the US have a partnership that’s been in the making for over seven decades. It started after World War II and survived the Iranian Revolution, the Cold War, the Gulf War, September 11, and the proliferation of conflicts across the Middle East.
Today, there’s a shift in the relationship. Saudi Arabia’s intervention in Yemen has created the worst humanitarian disaster in the world – and thrown the Middle East into chaos. The problem is, the Saudis are using US bombs to do it.