Updated

Pilots are getting a break from enduring the stepped-up and intrusive screening of airline passengers that's causing a public outcry.

Days before the Thanksgiving holiday travel period, Transportation Security Administration chief John Pistole offered little hope of a similar reprieve for regular passengers.

The agency agreed on Friday to let uniformed airline pilots skip the body scans and aggressive pat-downs. Pilots must pass through a metal detector at airport checkpoints and present photo IDs that prove their identity.

The change followed a 2-year lobbying campaign by union leaders, their efforts boosted by hero pilot Chesley Sullenberger, who said pilots should be treated as "trusted partners" in the fight against terrorism.

Complaints from Sullenberger, who landed a passenger jet in the Hudson River in January 2009, and others gave weight to the movement to roll back the new measures.

Some activists are urging travelers to refuse to go through full-body scanners, which produce a virtually naked image.

If a loosely organized Internet campaign succeeds, security lines at airports could be snarled. Those who refuse a body scan can be forced to undergo time-consuming fingertip examinations, which include clothed genital areas and breasts, by inspectors of the same sex as the traveler.

American Airlines pilot Sam Mayer said such screening for pilots makes little sense.

A pilot intent on terrorism could simply crash the plane. No amount of imaging at the security checkpoint could stop that. Besides, under another government program to make them the last line of defense against terrorists, pilots are allowed to have guns in the cockpit.

The changes promised by TSA are "basically what we've been after," Mayer said. "Pilots are not the threat here; we're the target."

Mayer's union, the Allied Pilots Association, helped foment the backlash against the security measures two weeks ago. Its president, Dave Bates, urged pilots to skip the imaging machines because of concern about frequent radiation exposure. The government and an independent group of experts say radiation is safe, as long as radiation doses are kept within the low limits set for the scanners.

Bates recommended that pilots instead accept a pat-down — preferably where passengers couldn't see them.

John Prater, president of the Air Line Pilots Association, which represents pilots at several major airlines, said the unions have been negotiating the changes with TSA for two years. He said changes were in the works, but were speeded up by the backlash against the new imaging machines and searching techniques.

The TSA offered few details — and no specific timeline — for changes in screening of pilots, which expand a program tested at airports in Baltimore, Pittsburgh and Charlotte, N.C.

The TSA said that beginning Friday, pilots traveling in uniform or on airline business could pass security by presenting two photo IDs, one from their company and one from the government, to be checked against a secure flight crew database. Their unions said pilots could skip the pat-downs immediately.

Pistole said pilots ensure the safety of millions of passengers every day, and that putting them through a faster screening process would be a more efficient use of the agency's resources. But he has defended the more invasive inspections of passengers, saying they were a response to intelligence about potential terrorist attacks and plots to evade airport security.

Homeland security officials were alarmed last Christmas when a terrorist with a bomb in his underwear got on a flight to Detroit. He failed to detonate the explosives. Last month, terrorists tried mailing bombs hidden in ink cartridges and shipping them on planes as cargo.

Some lawmakers who are feeling heat from voters have called for a review of the TSA procedures.

The government could ease concerns through different technology. The TSA is testing a new body scanner that produces stick-figure images instead of pictures of the traveler's naked body.

While pilots celebrated Friday, other airline employees feel left out.

The president of the flight attendants' union at Southwest Airlines said if pilots can bypass the screening process, so should his members.

Thom McDaniel said attendants go through FBI checks just like pilots do, and making them go through the regular screening is "a double standard."

Prater, the pilots' union president, said he believes the government will eventually approve a system of allowing regular passengers to pass background checks and qualify as "trusted travelers" who can skip through security just by showing identification that can be verified in a computer database.

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Koenig reported from Dallas. Associated Press writer Eileen Sullivan in Washington contributed to this report.

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Online:

TSA: http://www.tsa.gov

Allied Pilots Association: http://public.alliedpilots.org/apa/default.aspx

Air Line Pilots Association: http://www.alpa.org/