FILE PHOTO: A United Airlines Boeing 737 MAX 9 jetliner is grounded, as passengers try to rebook their tickets from cancelled United Airlines flights after U.S. air safety regulator the Federal Aviation Administration (FAA) grounded 171 Boeing 737 MAX 9 jetliners for safety checks because of the emergency landing of an Alaska Airlines plane, at Luis Munoz Marin International Airport in San Juan, Puerto Rico January 7, 2024. REUTERS/Miguel J. Rodriguez Carrillo/File Photo
