And they were not necessarily trying to kill but to take out the financial spine of our country. Next time it is supposed to be the heart of America as I recall. I wouldn't want to live in DC right now.
Or it could mean something we love. "The heart."
If this is what they meant, heck, no body loves DC.
I fear the kids in school," mothers are weeping for their children" or maybe they think Hollywood rules our hearts because of the media.
I think they mean something that will really break our hearts, rather than a political or monetary target.
Just a guess.