Another angle from when the shooting first started.
The fact nobody starts running immediately freaks me out.
To be honest gunfire sounds different in real life compared to what you hear in the movies. If people have not heard gunfire before they may mistake it for something else especially in a parade setting.
Seems like the weapon probably has about a 30 round clip with that long pause between gunfire being them reloading. Probably an AR-15. Fucking sad that regular people can get a hold of something like that in America. RIP.