audited and inspected various security related aspects of tsa, including passenger and baggage screening operations, precheck, the federal air marshall service, and i.t. systems. these resulted in being issued 24 reports to tsa with 138 recommendations designed to reduce security vulnerabilities in the aviation transportation system. for example, these covert testing continues to reveal persistent, troubling problems. since inception, we conducted thousands of covert tests. we assessed through covert testing checked baggage screening, passenger screening at check points, and airport access controls. our findings and conclusions from these tests have been consistent with those of tsa's internal testing in these areas. because covert test results are classified, they cannot be discussed here today, but we provided the department, tsa, and our appropriate congressional committees with our classified reports. our covert testing has identified vulnerabilities related to people, processes and procedures, and technology, specifically. people often contribute to weaknesses and security operations due to complacency, or failing to think critically. tsa processes and p