Roiling plume of smoke, a controlled fire set in the mountains near Canmore, Alberta

2009-09-25 - This roiling plume of smoke, a controlled fire set in the mountains near Canmore, Alberta, was taken by Canadian Space Agency Astronaut Bob Thirsk from the International Space Station. Strong winds had pushed the smoke towards areas of Calgary and Cochrane, generating concern among its citizens. Alberta Health Services has issued a precautionary smoke advisory for Bragg Creek, Canmore, Springbank, Cochrane and Calgary. (Credit: NASA)