Seen a HMMWV as a 5th wheel????

Listers;

The other day I took some shots of a HMMWV that was configured as a 5th wheel.  Has anyone ever seen anything like this?  Im in the Corps and have never!  So I got about 5-6 shots to give you all, if anyone can send a place for me to post them I will.  The 5th wheel is a non expandable van configuration, looked like a heater/Cooler van of some sort.  The "owners" werent around so I didnt get any info about what it does exactly.  Used the M1097 as the towtruck.  At anyrate, its just FYI.