So I went down to the Richmond Republican Headquarters to check things out and theu still haven't swept up the glass.

The first set of windows is broken while the second set seems untouched. There were 4 people sitting in the lobby. The glass lay sitting on the ground when I took this picture at 2 PM. After taking the photo, a woman came out to go next door. She went under the door instead push.

There is a camera, so I expect to see some footage at some point.

3 more windows are broken. A large Trump sign is visible. As you can tell, a bank is across the street with cameras that could see the suspects. A person who works nearby tells me that a dog usually stays in the office overnight, they weren't sure if the dog got out.

I don't know about physics of broken windows. I am not sure how a window can have a break so circlar.

I didn't see anything like rocks or bricks mixed in with the glass. They could have been removed from the glass, or it was done with something that isn't a projectile.