[nm_james]

It's difficult to smother a fire with CO2 - particularly in an open building, unless somebody is directing it.

Foam is by far your best bet for a jet fuel fire. You need something that sits on top of the fuel and smothers it.

You could have lots of small foam packs throughout the building that expand when exposed to fire.

Another approach would be to try to provide a means to drain away the jet fuel. But it would be difficult to keep everything in place after a hit by a plane like that.

[drlevy88]

Could fire crews be made ready for something like this in the future by having foam supplies that are deliverable to skyscrapers by helicopter... or even balloon?