Cell phones to 'smell' biochem attack?

I remember coving this topic about 2 years ago...seems like it's been taking a while to move on this. Anyway, its implications are both 'reassuring' and yet 'worrying' - hopefully, you won't need to ask why!

If you ever get caught up in a chemical or biological weapons attack, your cellphone may save your life. Or at least that's the ambition of the Department of Homeland Security. The Department's science and technology team has begun talks with four cell-phone manufacturers on designing 'nextgen' phones that would be able to sense a wide variety of noxious chemical compounds in the air - and alert the user. The director of the "Cell-All" program at the DHS, Stephen Dennis, tells CNN that within a year, "We expect up to 80 prototype cell phones to be developed that can be then tested against various agents."

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