Worst Case
U.S. Report Lists Possibilities for Terrorist Attacks and Likely Toll, reports the New York Times, which notes:
"The document, known simply as the National Planning Scenarios, reads more like a doomsday plan, offering estimates of the probable deaths and economic damage caused by each type of attack. The department did not intend to release the document publicly, but a draft of it was inadvertently posted on a Hawaii state government Web site."
Hmm. What's the Hawaiian word for 'Oops'?
Actually, the document doesn't appear to have been all that secret, a fact that would be more the fault of the feds than anyone.