[Wolfman77]

Well, a year ago they were working on this
http://weekendpundit.blogmosis.com/l...nd/025046.html
at 3.8 microns I believe that put it in the infrared part of the spectrum. I don't know if they are using anything similar to this or not.

No date on this one
http://www.smdc.army.mil/FactSheets/HELSTF.pdf