FILE - In this April 1, 2020 file photo, several dozen mothballed Delta Air Lines jets are parked at Kansas City International Airport in Kansas City, Mo. The skies are clearing up a bit for airlines as states ease lockdown measures and travelers slowly return to airport check-in lines. More airlines are restoring flights to their schedules and investors have taken note, driving up shares for the major airlines after a staggering decline. (AP Photo/Charlie Riedel, File)
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