9/11 mastermind redesigned vacuum cleaner
He is the confessed mastermind of the world's worst terrorist attack, who, as Osama bin Laden's trusted lieutenant, became a symbol of al-Qa'ida's campaign of hate.
However, Khalid Sheikh Mohammed, Guantanamo Bay's most notorious inmate, is apparently a Harry Potter fan who was once allowed to redesign a vacuum cleaner in an attempt to keep him sane in prison.
The terrorist, who is facing military trial after admitting responsibility "from A to Z" for the attacks on the US on September 11, 2001, was also rewarded with Snickers bars for doing "homework" on his knowledge of al-Qaida by prison guards.
Mohammed was subjected to the most extreme techniques, including being forced to stay awake for 180 hours and being waterboarded 183 times during his interrogation.
"We didn't want them to go nuts," a former unnamed senior CIA official said, referring to the task given to Mohammed to redesign the vacuum cleaner.
The CIA said the records regarding the Mohammed-designed appliance, "should they exist", would be considered operational files of the CIA and therefore exempt from ever being released to the public.
While held in a US prison in Romania, Mohammed also became a fan of the Harry Potter books, the official claimed.
However, the Kuwaiti terrorist, who has admitted roles in 30 jihadi plots including using his "blessed right hand" to behead the 'Wall Street Journal' reporter Daniel Pearl in 2002, may have had ulterior motives for his reported obsession with JK Rowling's tales of sorcery.
Mohammed was once caught trying to hide a message on the pages of a novel warning his fellow inmates not to talk about bin Laden's courier. (© Daily Telegraph, London)