Any news coming from any one of:

• The New York Times

• The Wall Street Journal

• The Washington Post

• ABC

• CNN

• Fox

That reports of an attack on the power plant will resolve yes.

Things that are insufficient to resolve yes alone:

• An evacuation order being issued (i.e, precautionary, not in response to an attack)

• News reports of "plans" of an attack

Things that are irrelevant to this question:

• Who is responsible for the attack

• Whether it is staged, faked, deliberate, or accidental (e.g, misfire)

• How much damage is done