WASHINGTON (CNN) -- Investigators with bomb-making components in their luggage and on their person were able to pass through security checkpoints at 19 U.S. airports without detection, according to the Government Accountability Office.
GAO officials are expected to testify about the investigation Thursday before the House Committee on Oversight and Government Reform.
The investigators reported that most of the time security officers followed TSA policies and procedures, but investigators were able to take advantage of "weaknesses in TSA [Transportation Security Administration] procedures and other vulnerabilities.""These weaknesses were identified based on a review of public information," the planned GAO testimony says .
Investigators concluded that if they had attempted the same test at other airports, they would have evaded detection.