February 13, 2018
Disturbingly, the video had been (and still is) posted to the EPA's YouTube channel as "Unlisted" thereby making it invisible to searches. The video calls a nuclear attack on the United States "a frightening and very real threat" and reveals that agencies have been training, preparing for, and even rehearsing their responses to a nuclear attack on the United States.
March 10, 2015
Great find... I didn't know about this video, and yes, it is legit.
Thanks for posting! I am going to add it to the database - as I just found it on EPA.GOV as well.