There is a room in my building. It is heavy concrete on all sides. There are drums and rock in this room. There is a door in this room. The vast majority of the bothersome noise escapes through the ...

School security is now a significant market in the US, reaching $2.7 billion in revenue in 2017. This valuation is not solely credited to physical security (such as bullet-resistant doors) although ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. HARRINGTON ...