"I was ordered to construct the first 100 cells at Guantanamo within 96 hours [4 days]. The first group of 20 prisoners arrived 7 days after the order was given. We were told that the prisoners were the 'worst of the worst', a common refrain for every set of detainees sent to Guantanamo. The US has held 779 men there, most of them cleared for transfer, but stuck by politics.