[abhay]

I have always wondered why there aren't more visible chemical 'sniffers' in all airports as I've seen at NY's Penn & Grand Central Stations. They're not really in the way and there are specific security protocols in place if one of them go off. iRobot is already producing bomb sniffing bots for the military and I doubt it'd be too hard for the technology to be adapted for airport checkpoints.

[warfangle]

Ah, is that what those things that are labeled as EPA air quality stations are?

[frisco]

Yes.