The Transportation Security Administration has little evidence that an airport passenger screening program, which some employees believe is a magnet for racial profiling and has cost taxpayers nearly one billion dollars, screens passengers objectively, according to a report by the inspector general for the Homeland Security Department. …

According to the report, the T.S.A. has not assessed the effectiveness of the program, which has 2,800 employees and does not have a comprehensive training program. The T.S.A. cannot “show that the program is cost-effective, or reasonably justify the program’s expansion,” the report said.

As a result of the T.S.A.’s ineffective oversight of the program, it “cannot ensure that passengers at U.S. airports are screened objectively,” the report said.