In this Jan. 26, 2016, file photo, a Southwest Airlines Boeing 737 waits to taxi to a gate to a gate at Seattle-Tacoma International Airport in Seattle. (AP Photo/Ted S. Warren, File)
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In this Jan. 26, 2016, file photo, a Southwest Airlines Boeing 737 waits to taxi to a gate to a gate at Seattle-Tacoma International Airport in Seattle. (AP Photo/Ted S. Warren, File)
