Secret document lifts Iran nuke constraints

A document obtained by The Associated Press shows that key restrictions on Iran's nuclear programme will ease in slightly more than a decade, halving the time Tehran would need to build a bomb. The document is the only secret text linked to last year's agreement between Iran and six foreign powers. It says that after a period between 11 to 13 years, Iran can replace its 5 060 inefficient separators with up to 3 500 advanced machines. Since those are five times as efficient, the time Iran would need to make a weapon would drop from a year to six months. Iran says its enrichment is peaceful, but the programme could be used for nuclear warheads. Two diplomats providing the information on Monday demanded anonymity because they weren't authorised to do so.