FILE PHOTO: File photo of Southwest Airlines planes in front

FILE PHOTO: Southwest Airlines planes are seen in front of the Las Vegas strip, Nevada, United States in this April 23, 2015, file photo. Southwest Airlines Co expects its technical systems to perform “normally” October 12, 2015, after glitches led to some 500 delays Sunday, a spokesman said in a statement. REUTERS/Lucy Nicholson/Files/File Photo

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