US 'believes Iran working on design of nuclear weapon'

The US believes the official intelligence assessment of Iran’s nuclear programme is wrong and Tehran is working on the design of a nuclear weapon, it was reported today.

…Washington is distancing itself from a controversial National Intelligence Estimate (NIE), produced by several US spy agencies in 2007, which suggested Iran had suspended work on weapons design four years earlier.

“After reviewing new documents that have leaked out of Iran and debriefing defectors lured to the west, Mr Obama’s advisers say they believe the work on weapons design is continuing on a smaller scale