Why Does Obama Need An Internet Kill Switch?

Right now, as we speak, a bill giving the President of the United States the ability to unilaterally shut down the internet, is making its way through Congress. I wonder why they feel that, no matter what the emergency is, that we would ever need to shut down the internet. In fact, the internet is an extremely valuable resource in every emergency that I've ever seen: floods, earthquakes, hurricanes, people have been saved by the internet, Twitter and mobile phones.

So what kind of emergency would require shutting down the internet? Only one. Dissent. In every other country which has the ability to shut down the internet, that is the reason that they shut it down. To quell dissent. And I'll bet that's the exact same reason why they want to shut it down here as well. 

Kind of makes you wonder: what are they expecting to happen?