Chaos, UFOs and NASA Warning

I wanted to share this video from YouTube I found recently.

It covers the seemingly increasing chaos across our planet, discussing storms, earthquakes and changing weather patterns.
It suggests a possible link between these events and the fast approaching comet, Elenin, due to pass Earth in October. The makers of the video also throw in a good measure of UFO footage.

The video raises more questions than it answers, but it does put forth a reasonable argument that there is a lot more going on around the world than we are really very aware of.
Why are NASA, for example, warning their staff to be prepared against attacks from outerspace?

And why is this video on YouTube?

Food for thought, friends, food for thought.