Taliban fighters take refuge in the wild pot forests of Asia. The plants absorb heat to foil thermal imaging systems, and are too soaked with water to burn. The Canadian troops in the area are pretty tenacious though so they kept trying, with phosphorus, diesel, everything. Some brown plants on the edge caught fire, but it got the troops downwind high, so they gave up. Gives new meaning to the term, "Let's smoke 'em out." http://news.bbc.co.uk/2/hi/south_asia/6052270.stm