FILE - In this March 17, 2016, file photo, travelers authorized to use the Transportation Security Administration's PreCheck expedited security line at Seattle-Tacoma International Airport in Seattle have their documents checked by TSA workers. Massive lines at airports have now led to a backlog of people trying to enroll in trusted traveler programs. Waits to join PreCheck or Global Entry are months long in some cities. (AP Photo/Ted S. Warren, File)
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