Originally Posted by Bart

When a TSO is newly hired, upon completion of the basic screener training course, that new TSO has to pass an x-ray imagery test. Upon completing 60 hours of on-the-job training, that TSO has to pass another x-ray imagery test but at a higher standard. From that point on, that TSO takes a quarterly x-ray imagery test that he/she must pass at an even higher standard. And on top of that comes an annual skills certification test that includes yet another x-ray imagery test but at the same standard as the quarterly test. If they fail to meet TSA standards during any one of these tests, the TSO is terminated.