They have to exist or not in their own right. I mean, with kids, you don't say, 'Which is your favourite,' or 'Which did you enjoy bringing up the best?'
Perhaps 'Big Bang' fans feel so protective of the show because it is, despite being a hit show on a big network, something of a word-of-mouth phenomenon.
Since the tragedies, the Department of Homeland Security was established to prevent terrorist attacks within the United States, and most importantly, to share intelligence information among government agencies and departments.

