Minneapolis police department 'fortified' their station at one point. Those bricks are interlocking and don't require mortar. They didn't use mortar, they used expanding foam, which made the wall flammable
This is truly their best and brightest doing their best
I think people came to conclusion it wasn't foam but a polyurethane adhesive, like gorilla glue.
you sure?
Not really but that's what I've seen discussed. Supposedly using this kind of glue instead of cement is actually a thing because it faster, easier and harder to fuck up.