The Federal Aviation Administration (FAA) is responsible for overseeing the safety and certification of all civilian aircraft manufactured and operated in the United States. During the original certification process for the Boeing 737 MAX aircraft, Boeing included limited information on the Maneuvering Characteristics Augmentation System (MCAS) in its initial briefings to FAA; MCAS was later cited as a contributing factor to two fatal Boeing 737 MAX crashes in 2018 and 2019.