Hah Alph can't list any, so he posts links to what could happen (political imagination)

The fact is none have happend yet.

This is going to be a very short list because there have not been any.

Hasn't happened yet =/= won't happen

start with the pentagon reports

http://www.defense.gov/releases/release....

edit..and more for the resident denier kano:

http://www.resilience.org/stories/2013-0...