Here is a video that a local resident shot of firefighting activities on August 22, 2011 near Dubois, Wyoming. The action starts at around the 3:00 minute mark. The narration is interesting. As a lead plane makes a pass the videographer says:
I think it’s spraying that stuff.
But the editing is interesting, doing slow-motion replays of the air tanker drop.
Check out the excellent photo of Tanker 910, a DC-10, dropping on a fire in Oregon on Monday.