Then we find out the most amazing part of the movie. The answer is simple. The flammable chemicals become even MORE flammable when doused with water. So a bunch of helicopters are used to put out this pink powder on the train. This doesn't do anything except make the fire flare up and cause everyone to spontaneously put their hands in front of their faces.
People walk around and mutter some more about the bomb.
Then the guy who was lowered into the train gets a call from the President of the United States. The guy isn't anyone special, but the President wants to talk to him anyway. He tells the President that nothing can be done. Unfortunately, no one else thinks this way. They all leave.