https://www.bbc.co.uk/news/world-latin-america-40090809

https://www.spiegel.de/international/world/the-pain-of-listening-using-music-as-a-weapon-at-guantanamo-a-672177.html

Metallica singer James Hetfield has said he is proud that his music is used against enemies of the US

Metallica's Enter Sandman had became a particular favourite at the height of the War on Terror, when US interrogators admitted using music to break the resistance of captives in Iraq. The goal was to deprive them of sleep and offend their cultural sensibilities.

Unco-operative prisoners were exposed to children's TV music from Sesame Street, and the purple singing dinosaur Barney.

Sergeant Mark Hadsell of the Psychological Operations Company (Psy Ops) told Newsweek magazine: "These people haven't heard heavy metal. They can't take it.

"If you play it for 24 hours, your brain and body functions start to slide, your train of thought slows down and your will is broken. That's when we come in and talk to them."