Here's an A-10 tidbit for you. As with many combat aircraft, the A-10 has fire-suppressing foam in the fuel tanks--for obvious reasons. However, in Alaska, due to the extreme low temps and near non-existing humidity in the dead of winter, the fuel flowing through the foam caused static electricity, which in turn started fires in the fuel tanks, which the foam promptly extinguished. The only evidence of a tank fire was a trail of soot from the fuel vent on the bottom of the aircraft. Opening the individual fuel tank caps would expose melted foam in the tank(s) involved. Several different type foams were used to no solution during my time with the A-10s in AK. The biggest concern I had was with the external "ferry" fuel tanks that had no such foam. Standard ground checkout was to transfer fuel from the external tanks into the wings tanks and back into the externals to verify system integrity. The experts said it couldn't happen, but during one generation exercise, when the pilots performed the transfers as part of the deployment, one aircraft started puffing smoke from the aircraft fuel vent. I shut down the operation and the pilot evacuated. Once again, the foam worked as advertised and extinguished the fire, luckily before it fed through the external tank system into the half- full "non-foam" external tank.