Security officials say Denver International Airport needs more lines to cut down on wait times.
The Denver Post reports a Transportation Security Administration bulletin said the airport layout limits lines to screen passengers at 30 rather than the 37 needed.
An airport spokesman said a plan is in the works that could move security lines to a different floor by 2019.
America's fifth-busiest airport in April credited long longs with TSA staffing.
The airport could see its busiest month ever in July and is expected to break records from June to September.
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