A man works on a Southwest Airlines Boeing 737 Max aircraft at the Southern California Logistics Airport, also known as Victorville Airport, in Victorville, California, the United States, on March 27, 2019. A Southwest Airlines Boeing 737 Max, on its way to Victorville, where Southwest Airlines is storing the airplanes, to be grounded, made an emergency landing at the Orlando International Airport (OIA) Tuesday afternoon, authorities said. (Xinhua/Zhao Hanrong)