The Federal Aviation Administration (FAA) has warned U.S. airlines to exercise caution when flying in or around Saudi Arabia due to ongoing military activities and navigation system risks. This warning, effective until December 10, follows deadly attacks by Yemen's Iran-backed Houthis, which have closed Riyadh's King Khalid International Airport since last week. The attacks escalated on Saturday, with a projectile striking a passenger terminal, killing at least 12 people and wounding over 300. Delta Air Lines is scheduled to launch its first nonstop flight from Atlanta to Riyadh on October 23, and as of Sunday night, had not changed its plans.