One reason airport security measures frustrate travelers is that screening procedures tend to treat all passengers the same: as potential terrorists.
But in the wake of the furor last fall over pat-downs and body scanners, several industry organizations are working on proposals to overhaul security checkpoints to provide more or less scrutiny based on the risk profile of each traveler.
While the proposals are in the early stages, they represent a growing consensus around a concept that has the support of John S. Pistole, the head of the Transportation Security Administration: divide travelers into three groups — trusted, regular or risky — and apply different screening techniques based on what is known about the passengers.
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A crucial part of the group’s “checkpoint of the future” proposal, and similar plans under discussion by other industry organizations, is creating a trusted traveler program that would allow passengers to undergo a background check to gain access to an expedited security lane at the airport.
http://www.nytimes.com/2011/02/08/business/08security.html?_r=1