the extreme response force

"Two or three guards immediately entered the cell while he was lying on the floor. One forced Mr Ait Idir’s body onto the steel floor of the cell and jumped on his back, using his knees to pound Mr Ait Idir’s body into the floor."
This testimony, contained in a lawsuit filed in a US court in April 2005 on behalf of Mustafa Ait Idir, is one of many allegations of beatings and other violence by the Initial or Extreme Response Force, groups of around five Guantánamo guards sent to detainees’ cells to punish them for minor or imagined disciplinary infractions of prison rules.
On 24 January 2003, a man in an orange jumpsuit was brutally treated at Guantánamo and reportedly suffered a brain injury as a result. He was not a detainee, but a US military guard who had volunteered to pose as an unco-operative detainee in a training exercise. However, the five-man team sent in to extract him from his cell was not told it was an exercise. The guard says that they slammed him to the floor, put him in a painful chokehold, and pounded his head at least three times against the steel floor.