I'll say this: If the next terrorist attack is aborted by a LAWFULLY armed citizen, the paradigm will take a dramatic shift back to the vision of the Founding Fathers.
No state or federal agency can lawfully mitigate that right. They get away with it not because we respect their legitimacy in the matter , but because we fear their power to deprive us of life, liberty and the pursuit of happiness. They have trumped our right by overwhelming force, trampling on The Constitution as they do it.
Now, the reality is; whether or not on wishes to risk arrest and imprisonment for the sake of Constitutional principle. Most folks would rather not be hauled way in irons. So, maybe we should continue to approach this incrementally. Piece by piece, until we recoup what we have lost.
That's not to say that I won't make discreet arrangements for my defense and the defense of family and country. I won't let pieces of paper stop me from self protection.