Can you elaborate? What's your proposed motive for a publicity stunt?

I disagree with the OP but that's a bit of a non-question. I was under the impression that the motive for any sort of publicity stunt is trying to gain publicity..

Yeah sure, and what's the purpose of that for a federal organisation as prevalent as the military?

Trying to portray a message of transparency after few years ago being exposed by Snowden for running a non constitutional spying program on all US (and non US) citizens. I thought the motive for positive publicity from the DoD since that happened would be pretty obvious.

You can look up the people involved using GitHub. A desire for positive publicity doesn't invalidate anything good an org does.