USA Today.
The past several months have witnessed a heated debate over the best way
 for America and Israel to respond to Iran's nuclear activities. 
Although the U.S., the European Union and Iran have recently returned to the negotiating table, a palpable sense of crisis still looms.
It should not. In fact, a nuclear-armed Iran 
would probably be the best possible result of the  standoff and the one 
most likely to restore stability to the Middle East.
The
 crisis over Iran's nuclear program could end in three  ways. First, 
diplomacy coupled with  sanctions could  persuade Iran to abandon 
pursuit of a nuclear weapon. But that's unlikely: The historical record 
indicates that a country bent on acquiring nuclear weapons can rarely be
 dissuaded. Take North Korea, which succeeded in building its weapons 
despite countless rounds of sanctions and U.N. Security Council
 resolutions. If Tehran decides that its security depends on possessing 
nuclear weapons, sanctions are unlikely to change its mind.
The
 second possible outcome is that Iran stops short of testing a nuclear 
weapon but develops a breakout capability, the capacity to build and 
test one quite quickly. Such a capability might satisfy the domestic 
political needs of Iran's rulers by assuring hard-liners that they can 
enjoy all the benefits of having a bomb (such as greater security) 
without the downsides (such as international isolation and 
condemnation).