I wish there was a transcript to go with these slides, or some context. It looks like an amazing talk. One thing that jumped out at me right away is that the explosives sniffer is also configured to detect narcotics, amphetamine and marijuana. Is this standard procedure at American domestic airports?
The classic example is searching for large sums of cash. Detecting large quantities of traveling cash and ensuring it's been properly declared is CBP's (Customs and Border Protection) job, not TSA's. But because TSA gets to X-ray and search every bag and body-scan every passenger, they catch that stuff, and then hold the passenger and go get CBP.
The result is that the number of outside-the-mandate things that can end up happening as an "incidental" result of TSA's screening is staggering.