There is actually a really funny story behind it:
I was at a morning briefing in WMC (fireflyer might have been there as well actually) and they had the "ATF" in town. when working with the BLM "ATF" means "aerial task force" (I know they borrowed ATF from another unit, but, oh well...) It's a new concept where they pull an air attack and a few tankers plus a helicopter together to form a firefighting mega machine.
All these guys wore brand new blue shirts with "ATF" written on them on the back in big yellow letters.
Anyways,
at the briefing, after a few arguments, the aviation manager there suggested since ATF is already taken, they should call this force "aerial support squadron" . . .
Of course we couldn't spell that out and keep our PG-13 rating