John L. Ames of the Florence Fire Department took this photo of Air Tanker 911, a DC-10, dropping on the Lolo Peak Fire south of Missoula near Florence, Montana August 19, 2017.
Mr. Ames said it made several drops along with numerous other air tankers and helicopters.
Since the fire started on July 15 it has spread across 27,000 acres. About 9,000 of those acres burned Friday, August 18.
Wildfire Today has more information about the fire.