Iran threatens to pull out of nuclear Non-Proliferation Treaty. It's not like Iran being in the NPT is doing anyone any good. The NPT allows inspectors to check out nuclear facilities to make sure they're not being misused - and Iran is already turning away these inspectors. But big picture: Iran might pull out of the NPT? Oh no! Then they might do something really crazy - like putting a Heavy Water Reactor online or ramping up their nuclear program.