In the constant effort to detect explosives and other dangerous items, I can see TSA trying new innovations. Gotta admit, though, that ETDing boarding passes doesn't cut the mustard with me.

There are other ways to detect explosives.

By the way, simply washing your hands doesn't do the job. Yes, our technology is THAT good. The "false-positives" aren't necessarily false. The machine detected what it is supposed to detect. A lot of you just don't realize that glycerin, which can be quite deadly when mixed with nitro, is also found in skin care lotions. Same applies for many other ingredients which can be put to good use (pain medication, skin care, heart medication, etc) or for diabolical use. When an ETD machine alarms, all it's saying is: "I found what you programmed me to look for...YOU figure out the rest."