while taxiing at denver a few in july i heard on united ch 9 a 737 doing
approaches for new runway, -call sign was "flight check"

then yesterday was talking about new runway with news guy at work (i work for
group of radio stations) - he was on board one of the flight check flights with
some other media people as they demonstrated some cat III landings.

he didn't know i was pilot, but probably could have joined him - and i'm
kicking myself i didn't know about it to even ask.