"Noble cause" is so easily re-defined based on what side you are on. I would have to say that bravery is risking one's own safety/life to ensure the safety/life of others especially those less able. Those rescue workers and citizens of New York that helped and in some cases gave their lives to even attempt to save others; those passengers on the flight that crashed in Pennsilvania; those were the brave people in this situation. America may not be necissarily "brave" by this definition, but it is our intention to keep the killing down to those that have and would kill many more innocent people. I think that is all that can be done in this situation.