I suspect most Americans are not well informed about continuity of government plans that are already in place. This Newsweek piece serves an educational purpose in that context.
Still, I can’t help noting an ambiguity. That is, the existing plans as described in the article could, conceivably, be implemented without public announcement. Martial Law could be in effect without anybody noticing.
I doubt such a wild improbability has occurred, but you never know. Have fun.