In this satellite photo provided by Planet Labs Inc., an area of Prince Sultan Air Base in Saudi Arabia that once saw Patriot missile batteries stationed with one advanced Terminal High Altitude Air Defense unit stands empty Friday, Sept. 10, 2021. The U.S. has removed its most advanced missile defense system and Patriot batteries from Saudi Arabia in recent weeks, even as the kingdom faced continued air attacks from Yemen’s Houthi rebels, satellite photos analyzed by The Associated Press show. (Planet Labs Inc. via AP)