Linda - my suspicion about the 'reason' for the ban was confirmed upon reading the article. Thanks for posting that.
Asked about the FAA flight ban, Hanson it was due to high power lines and "security reasons that we can't reveal." He said the flight ban remains in effect.
Read more: http://www.businessinsider.com/faa-closes-airspace-over-flooded-nebraska-nuclear-power-plant-2011-6#ixzz1PWcqNFYt
Got the feeling that the 'security reasons' are/could be pretty serious .... or else, the guv really is implementing one more tried and true exploitative exercise in the continuing campaign of 'State of Fear'.
Reader's choice.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...