There are 191 UN member states. All but five have signed the NPT. (India, Pakistan, N. Korea, Israel -- points to any Talkbacker who can name the fifth.) You are judged by the company you keep. Even presuming that Ahjmadinejad's inflammatory bluster is an "exterminationist threat," why does that render the NPT a threat for Israel? All the joining (as a declared weapons state, like the U.S. and the other five nuclear states) would mean is that Israel would be obliged not to transfer weapons technology to others, and to work toward disarmament. Keep in mind, Israel not only threatened to wipe Palestine off the map, it actually did so.
Manhunt in Memphis, Tennessee continues after officer, 33, fatally shot (AP)