Here's the NATCA (ATC Union) press release on the event...
http://www.natca.org/mediacenter/pre...il.aspx?id=394
Predictably, the FAA and NATCA line up as follows:
FAA: "Safety was not compromised."
NATCA: ""...absolutely the worst scenario you can think of."
To both I say, "Hyperbole. Safety
was compromised, but I can think of scenarios worse than this one."

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I don't know, from a controllers perspective, it doesn't get much worse then the building going dark and no radios, land lines or radar... Sounds real safe to me...
regards
Scott