Above: A DC-10 drops on a fire in Australia. New South Wales Rural Fire Service photo.
The New South Wales Rural Fire Service apparently thinks their two year trial of two air tankers, a DC-10 and a C-130, was a success, and expect to keep using them for several more years.
The state of Victoria also has been using air tankers from North America during their down under summer for the last two years, an RJ85 and another C-130. Both states have been using single engine air tankers and helicopters for a long time to aid firefighters battling bush fires.