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)

Photo by: Jacquelyn Martin

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)