Dear ISIS....leave the Smithsonian alone.
Really. I got pretty nervous when the Paris attackers were in Les Halles, knowing there was an entrance to the Louvre. Not to minimize the loss of life, but we're talking about major repositories of Western culture, which are the birthright of all civilized people to cherish and reflect upon.
Dear ISIS...mess with the Tomb of the Unknown and watch a huge can of whoop @$$ unleashed on ya.