There’s another thread addressing whether or not the CIA is talking out of their ass about putting the nation on high alert due to the perceived possibility of another attack.
But my question is this: assume they really do have intelligence about another attack, and it is narrowed down to where it will probably be. Should this information be made public, or should they have done what they did and put out a general announcement, thereby putting everyone on guard?
My own theory is that there is indeed information about a real threat at specified locations, but this cannot be announced to the public because it would become clear to the perpetrators just where the sources came from (eg, a phone tap or something), and then that avenue of information would immediately be closed. But does the risk of this outweigh not telling the target or the public at large?
(As an aside, I would guess that as a practical matter the CIA would in fact give a confidential alert of some sort to the target, but do their best to make sure that it was not made available to the media or the general public.)
So the debate is: assuming there is a real known threat and where, should the public be told or not?