It was seized along with 49 other documents by the US in 2011, and now they have been made public by the Office of the Director of National Intelligence (DNI).
In the letter, apart from the one-time world's most wanted man discussing attacks on America and targeting France should efforts fail against the US,he wrote:
'Another very special and top secret matter - it pertains to the problem of the brothers who are with you in their unfortunate celibacy and lack of availability of wives for them in the conditions that have been imposed on them.'We pray to God to release them.'God is not ashamed of the truth.'As we see it, we have no objection to clarifying to the brothers that they may, in such conditions, masturbate, since this is an extreme case.'