VIDEO: Police and fire departments work side-by-side responding to 911 calls. But De Pere Fire Chief Alan Matzke says that also involves the same risks, "We don't know if they have weapons in that home, we don't know as to their mental health, so we find ourselves in a vulnerable position." That's why he says they're taking their partnership into the classroom. And it's all to better prepare firefighters for situations where they need to defend themselves. "What we're trying to do is at least provide them with a little bit of something. So, in the event, that they are faced with sudden assault or get in a bad situation, they have something to fall back on," said Jake Nowak, officer and defense instructor at the De Pere Police Department.