We’ve actually written about it before, but the video linked then has been removed, so here’s some more. Via War is Boring, with a tip o’ the hat to Comrade Arthur.
Here’s the short video:
[youtube https://www.youtube.com/watch?v=o9vAWEgw6cc]
And here’s a longer video showing more detail.
[youtube https://www.youtube.com/watch?v=7Wrz20iLAEA]