United Airlines

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FILE – In this July 14, 2016, file photo, David Samson, left, former chairman of The Port Authority of New York & New Jersey, and one of his attorneys, Justin Walder, right, leave federal court after Samson pleaded guilty to bribery during a hearing in Newark, N.J. Samson, who resigned in March 2014, is scheduled to be sentenced Monday, March 6, 2017, for using his post to get United Airlines to run money-losing direct flights between Newark, N.J., and Columbia, S.C., saving him an hour's driving time to his weekend home. (AP Photo/Mel Evans, File)

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FILE - In this Sept. 8, 2015, file photo, a United Airlines passenger plane lands at Newark Liberty International Airport in Newark, N.J. United Airlines seeks to narrow gap on competitors like Delta by beefing up routes from hub airports. The airline also wants to upgrade facilities at key airports and reduce its use of smaller planes on important business-travel routes. (AP Photo/Mel Evans, File)

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FILE - In this Sept. 8, 2015, file photo, a United Airlines passenger plane lands at Newark Liberty International Airport in Newark, N.J. United Airlines says an "IT issue" on Sunday, Jan. 22, 2017, affecting its domestic fleet forced the cancellation of six flights and delayed 200 more. (AP Photo/Mel Evans, File)

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FILE - In this July 25, 2013, file photo, a United Airlines plane takes off from Newark Liberty International Airport, in Newark, N.J. United Airlines let is club liquor license lapse in Newark, leading to two days, Wednesday, Sept. 28 and Thursday, Sept. 29, without alcohol. The membership club offers free drinks to frequent fliers. (AP Photo/Julio Cortez, File)

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United Airlines has suspended pilot and Republican lawmaker Michael Folk after he wrote on social media that Hillary Clinton should be hanged for treason. (Facebook/@Michael Folk)

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A United Airlines representative, right, helps stranded travelers at Denver International Airport as a severe spring storm packing high winds and heavy, wet snow sweeps over the intermountain West forcing the cancellation of hundreds of flights, Saturday, April 16, 2016, in Denver. (AP Photo/David Zalubowski) ** FILE **

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In a May 1, 2015 file photo, a United Airlines employee walks near a jet parked at Terminal C of Newark Liberty International Airport as the sun rises behind the New York City skyline, in Newark, N.J. (AP Photo/Julio Cortez, File)

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A Muslim family has claimed they were racially profiled against after they were kicked off a United Airlines flight from Chicago. (Facebook/@Eaman-Amy Saad Shebley)

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United Airlines passengers wait at the ticket counter of Washington Dulles International Airport in Chantilly, Va. (Associated Press)

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FILE - In this July 8, 2015, file photo, United Airlines planes are parked at their gates as another plane, top, taxis past them at George Bush Intercontinental Airport, in Houston. United Airlines pilots are ratifying a contract extension that includes pay raises and gives the company more certainty about labor costs, the Air Line Pilots Association reported, Friday, Jan. 22, 2016. (AP Photo/David J. Phillip, File)

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A United Airlines plane, front, is pushed back from a gate at George Bush Intercontinental Airport in Houston. (Associated Press)

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United Airlines has apologized after D'Arcee Neal said he was forced to crawl off a plane Tuesday night as he was traveling home from giving a talk about accessible transportation for the disabled. (NBC 4 Washington)

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A new Boeing 737-900ER airplane being delivered to United Airlines is parked in front of Boeing's newly expanded 737 delivery center at Boeing Field in Seattle on Oct. 19, 2015. (Associated Press)

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A United Airlines passenger plane lands at Newark Liberty International Airport Wednesday, Sept. 9, 2015, in Newark, N.J. Oscar Munoz, a railroad executive and head of United's audit committee, was named CEO and president. (AP Photo/Mel Evans)

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United Airlines CEO Jeff Smisek addresses a gathering at Newark Liberty International Airport, in Newark, N.J., in this Thursday, Nov. 14, 2013, file photo. Smisek, the chairman and CEO of United Airlines is stepping down in connection with an investigation into dealings with the agency that operates New York-area airports. (AP Photo/Mel Evans, file)

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In this July 26, 2015, file photo, a United Airlines passenger airplane passes over Whittier, Calif., on its way to Los Angeles International Airport. Fliers in certain markets are seeing bargain flights as fare wars make a limited return. (AP Photo/Nick Ut, File)