I don't remember seeing anything from their write-up of the drill (it was fairly extensive) that had anything to do with anything like that. Granted, I didn't read the whole thing, but my initial skim back when it was first released didn't even make me think about it. The report is here --
https://www.fema.gov/media-library/assets/documents/128345 if anyone wants to give it a more thorough review.