When the federal government takes over responsibility next month for airport security screening, top frequent fliers may wind up back at the end of long lines.

Officials at major U.S. carriers responded to the frustrations of their best fliers following the increased security measures since the Sept. 11 terrorist attacks. In November, most of the airlines began offering special security lines for passengers with elite status in frequent-flier programs...

But that valve may be sealed on Feb. 17, when the newly formed Transportation Services Administration assumes responsibility for airport security screening. Airline officials decline to comment about the prospects for continuing elite lines past this date, except to say that they are working with the government to ease the transition.

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