DC-10 dropping wildfire retardant in Tucson, Arizona

Looks like a marker aircraft followed by DC-10 dropping red fire retardant at a Tucson, Arizona brush fire (unknown date).

According to an NPR article, the red cloud dropped from aircraft is Phos-Check sold by Perimeter.

Up-close flyby of DC-10 Dropping fire retardant on the Arizona Bush Fire - YouTube

California fires: Here's what's in the red aerial flame retardant : NPR

Phos-Chek - Wikipedia

Home - Perimeter Solutions


Also ...

Air attack on California wildfires captured by National Guard member - YouTube