https://m.youtube.com/watch?v=6g3WYLS99uU

They are removing videos pretty fast, so maybe upload this...

3:47 - This was a drill, with an American man announcing "there is nothing going on here" as people peacefully file out of the arena. Lots of fake blood and smiles. Actors.

Also, in my opinion, there is child molestation at 1:01.

Possibly related: in the NDAA 2013, the ban on dissemination of deceptive propaganda to US citizens was overturned...

HR 4310 passes in NDAA authorizing propaganda on American Citizens

It is obvious and inevitable that Americans will be soiled by the propaganda machine. HR 4310 touches on this fact when it states the Department of State or Broadcasting Board of Governors are not prohibited from propagandizing US media, in any medium or form of communication, due to to potential that US Citizens may or may not be exposed to such program material. As long as the propaganda is disseminated after the effective date of the Smith-Mundt Modernization Act of 2012

http://www.opsecnews.com/hr-4310-passes-in-ndaa-authorizing-propaganda-on-american-citizens/