China became the first country to ground all of its 737 MAX 8 aircrafts by regulatory measure on March 11, with Indonesia, Mongolia, Singapore and other countries following suit.[1][2] The United States aviation authorities initially declined to ground the aircraft, but announced on March 13 that it would do so as well.[3] Shortly after, Panama's aviation authority became the last to ground its aircraft, at which point the MAX fleet worldwide was grounded.[4][5][6] Several countries without the 737 MAX fleet banned the aircraft from entering their airspace.