The gun and drill were used in two interrogation sessions against Abd al-Rahim al-Nashiri, according to a source familiar with the report's contents.

CNN: Top prosecutor orders probe into interrogations; Obama shifts onus

In other incidents involving Mr Nashiri, he was allegedly threatened with an unloaded gun and had a power drill held near him which was repeatedly turned on and off.

BBC: Guantanamo Bay detainees in 2002

Friel also pleaded guilty to a charge of possessing for a terrorist purpose an eye shield and visor, a mini rotary tool kit, drill bits, a heat gun, various tools and electrical material, berets, worksuits, gloves, plastic boxes, Bentley electronic timer instructions, batteries and duct tape on the same date.

BBC: Derry man Anthony Friel admits pipe bomb charges

" David Bomberg, a brilliant graduate of London's Slade School, who was painting admirably adventurous pictures of his own, remembered decades later that "the tense figure operating the Drill as if it were a Machine Gun" amounted to "a Prophetic Symbol of the impending war.

WSJ: Masterpiece: Jacob Epstein's Prophesy