Thoughts on ceramic plates (presumably body armor) inside two hanging bags on either side of the would-be shooter Routh's gun?

• where obtained?

• who knows to do this?

• formal training or movies?

"Law enforcement found the rifle, a scope, two backpacks with ceramic tile and a GoPro camera in the bushes at the scene, officials said."

https://www.cbsnews.com/news/trump-assassination-attempt-investigation-ryan-wesley-routh-florida/

https://www.ar500armor.com/c2-body-armor.html