Confined to the basement of a CIA secret prison in Romania about a decade ago, Khalid Sheikh Mohammed, the admitted mastermind of the 9/11 terrorist attacks, asked his jailers whether he could embark on an unusual project: Would the spy agency allow Mohammed, who had earned his bachelor's in mechanical engineering, to design a vacuum cleaner?
"We didn't want them to go nuts," the former senior CIA official said, one of several who spoke on condition of anonymity because they were not authorized to talk about the now-shuttered CIA prisons or Mohammed's interest in vacuums.
So, using schematics from the Internet as his guide, Mohammed began re-engineering one of the most mundane of household appliances.


The CIA apparently succeeded in keeping Mohammed sane. He appears to be in good health, according to military records.
AP Exclusive: The CIA and a secret vacuum cleaner