In this Wednesday, Feb. 3, 2021, file photo, a passenger wears a face mask she travels on a Delta Air Lines flight after taking off from Hartsfield-Jackson International Airport in Atlanta. Delta Air Lines will stop blocking middle seats in May, meaning that no more U.S. airlines will limit capacity on flights to reduce the risk of spreading COVID-19. Delta's announcement Wednesday, March 31, reverses a policy that had been in place since last April. (AP Photo/Charlie Riedel, File) **FILE**
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