Most recently here: An airport security alternative, please? wherein post #13 has links to earlier threads just in the past few months, and the final link has further links to earlier threads.

My opinion: reformation from the top down is extraordinarily unlikely, as the dysfunction of TSA starts with those at the top, and they don't appear to be open to the idea of change. And there are 61000 TSA employees (last reported number; probably more by now) and something like 25% annual turnover - two years of (fulltime?) education for each one would be outrageously expensive and unnecessary. They don't need more ideas, more "self-esteem" or more scope to be creative about "fighting terrorism." They need to pay attention to the image on the baggage x-ray to try to find the knife more than 30% of the time!