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In response to the cleanup - My Dad was a career Crash and Rescue firefighter for the Airforce and I was a volunteer for a number of years. What is typically used in the foam systems is a form of dish soap labeled AFFF (Aqueous Film Forming Foam or "A Triple F") (there are other additives based on the location or known combustibles in the building, but typically just a non-toxic bubbly stuff to cool down the combustible and slow down the amount of oxygen that can get to the fire. Foam sits on top of liquids like jet fuel and other stuff and doesn't splash it around like just plain water would - think of spraying cold water in a hot deep fryer - not good). All it takes is removing the fluff via fans or snow shovels and then a lot of power washing. You noticed a firetruck in one of the photos? The water cannon on those are a pretty effective power washer. Final thought - the B2's at Ellsworth are spendy. At least with a foam system like this you just wash off the planes and it doesn't damage the special paint and coatings on the aircraft. Also, if you're surrounded in AFFF foam, just swim your arms around infront of your face and you create an air pocket that you can breathe. Unless it's Baricade Foam, but that's a different story and not something they'd use in a location like this.
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