See the document
A Navy officer named Geoffrey Ingersoll shared on social media an image of an order signed at a U.S. Department of Defense command post prohibiting the playing of certain bands. The photo can be seen below.
According to the document, listening to Korn, Slipknot, Smash Mouth, Nickelback, and Creed is now prohibited at any time within the command post. The subject of the memo is "Ban on 'terrible' rock bands.".
