John S. Pistole

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"We need to be smarter in how we go about doing things. We need to use more common sense." - John Pistole, administrator of the TSA. (Associated Press)

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Transportation Security Administration Administrator John S. Pistole testifies on Capitol Hill in Washington on Wednesday, June 22, 2011, before a Senate Homeland Security and Governmental Affairs Committee hearing examining ongoing transportation security threats. (AP Photo/Jacquelyn Martin)

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Transportation Security Administration chief John Pistole says he is looking into airport scanning technology used overseas. (Associated Press)

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Transportation Security Administration Administrator John Pistole told CNN's "State of the Union" Sunday, Nov. 21, 2010, that the agency has no plans to change its policy of requiring travelers at many major airports to undergo either enhanced body scans or thorough pat-downs. (AP Photo/Harry Hamburg, File)

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In this Nov. 15, 2010, photo, Transportation Security Administration Administrator John Pistole, right, accompanied by Homeland Security Secretary Janet Napolitano, left, speaks to the media during a press conference to kick off the holiday travel season at Washington's Ronald Reagan National Airport. (AP Photo/Manuel Balce Ceneta)

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ASSOCIATED PRESS In this Nov. 15, 2010, photo, Transportation Security Administration (TSA) Administrator John Pistole, right, accompanied by Homeland Security Secretary Janet Napolitano, left, speaks to the media during a news conference to kick off the holiday travel season at Washington's Ronald Reagan National Airport. Pistole told the Senate Homeland Security Committee on Tuesday, Nov. 16, that passengers who refuse to go through a whole-body scanner machine and get a pat-down won't be allowed on planes, even if they turned down the in-depth screening for religious reasons.