Nuclear Weapons Testing in Garry's Mod

IMPORTANT The sound is weird at the beginning as apparently the siren soundtrack is similar to a song, and the owner of said song decided to have the video banned worldwide with it in so I had it removed.

Testing out the Gbombs addon for Garry's Mod on gm_bigcity, which can be found at this link:
https://steamcommunity.com/sharedfile...

The link below that I originally used for this mod appears to no longer be available, however this mod appears to be either a reupload, or an extremely similar version, as the objects appear to be mostly the same:
https://steamcommunity.com/workshop/f...
For this to work completely, you also need to download the materials pack:
https://steamcommunity.com/sharedfile...

This is the original link that appears to no longer work:
https://steamcommunity.com/workshop/f...