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The head of the Transportation Security Administration told lawmakers Wednesday that he's ready to fix his agency, which has come under scrutiny after a leaked inspector general report in June showed massive failure within the agency's front lines and left it with a "dismal report card."

The leaked report found that TSA officers failed to confiscate smuggled fake explosives and weapons in 67 of 70 covert tests.

"My highest priority is to ensure solutions to the recent covert testing failures," TSA Administrator Peter Neffenger said at a House Homeland Security Committee hearing Wednesday. "It disturbs me we had that failure rate at the checkpoint."

Just four weeks into his job, Neffenger has been tasked to ensure skeptical lawmakers who are wondering if the agency, created after the Sept. 11, 2001, terrorist attacks, has what it takes to keep Americans safe from terrorism at airports and in the sky.

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