Airport screening systems are not well tested, says GAO

The Transportation Security Administration still does not know whether its passenger screening systems at airports are effectively addressing the greatest threats to aviation, the GAO reported on Thursday.

High-tech screening devices have been installed at major airports based on threats described in intelligence reports, but risk assessments based on three key elements -- threat, vulnerability and consequence -- remain works in progress, the GAO said.

"Without operationally testing technologies prior to deployment, TSA does not have reasonable assurance that technologies will perform as intended," the report said.

House Homeland Security Committee Chairman Bennie Thompson, D-Miss., who requested the report, said it raises questions about the soundness of the TSA's strategic planning.

"I am supportive of the department's efforts to provide airports with the most effective security technologies available," he said, "However, a comprehensive and sensible strategic plan is critical to ensure that the government minimizes waste while securing the flying public."