Is it against a nuclear-armed adversary or one with only limited long-range strike capabilities?
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In any case, the situation in Pakistan, a nuclear-armed state of 180m people, looks dire.
The U.S. later said that port calls by nuclear-armed ships were not part of the deal.
Mr Netanyahu argued that even if a deal were possible, a nuclear-armed Iran would unravel any agreements.
He warned that discussions between the two nuclear-armed countries needed to take place in a calmer atmosphere.
The likely emergence of smaller, less-predictable nuclear-armed nations over the next few years creates a different equation.
The most likely sources are disenchanted, unemployed, underpaid or simply corruptible officials in Russia or other nuclear-armed states.
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The doves agree with Netanyahu that a limited Israeli strike is better than the alternative of a nuclear-armed Iran.
Clinton said Sunday that U.S. policy remains firmly opposed to a nuclear-armed Iran.
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It is fair to assume that Chinese leaders are sincere when they say they do not want a nuclear-armed Iran.
Their stated aim to build nuclear reactors is a clear sign that they recognize the danger of a nuclear-armed Iran.
And one of the things I will continue to remind our friends and allies is the danger of a nuclear-armed Iran.
Instead, the United States is now focused on how it will "live with" a nuclear-armed Iran by trying to "contain" it.
The SNP government in Edinburgh wants a fleet of nuclear-armed submarines to be removed from its base on the west coast of Scotland.
And it is also her position that we should trust the international community to protect us from the specter of a nuclear-armed Iran.
Once ratified, every other nuclear-armed country would agree to freeze its own arsenal and pledge to join multilateral talks in the second phase (2014-18).
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At that time President Musharraf had become a valued US ally in the fight against al-Qaeda and was making peace with nuclear-armed rival India.
And on the other hand, it warns Israel daily that it opposes any independent Israeli operation to prevent Iran from becoming a nuclear-armed state.
Today's visit to the Clyde by Defence Secretary Philip Hammond included a claim of 1, 200 jobs currently dependent on the next generation of nuclear-armed submarines.
The West and the Soviet Union managed their nuclear-armed cold war safely enough, so the argument goes, and India and Pakistan can do the same.
The fallout from a nuclear-armed Iran would be still more destabilising.
It cannot be in Russia's interest to see a nuclear-armed Iran.
Michael Mullen, has made several recent statements warning of the danger a nuclear-armed Iran will pose to global security - and by extension, to US national security.
He said economic reform would be his top priority, but news of a coup in nuclear-armed Pakistan brought worries of further conflict along the border in Kashmir.
Climbing down would make Israel look weak both to Hizbullah and to other foes who need to be deterred, such as Hamas today and, possibly, a nuclear-armed Iran tomorrow.
The confrontation started when the Soviet Union began covertly shipping into Fidel Castro's Cuba 72 nuclear-armed ballistic missiles, capable of wiping out U.S. cities from Florida to the Pacific Northwest.
In the late 1970s and early 1980s the idea was revived when American strategists began thinking in earnest about the technologies they would need to shoot down nuclear-armed ballistic missiles.
Would we allow the Israelis - who are under no illusion that their country faces an existential threat from a nuclear-armed Iran - to act alone against a danger we may share?
Under Baker's regency, the administration apparently now subscribes to the belief that they will be better off out of Iraq and with a nuclear-armed Iran, than in Iraq without a nuclear-armed Iran.
Cameron's spokesman, Jean-Christophe Gray, said the prime minister and Kerry also "reiterated their shared determination to prevent a nuclear-armed Iran" ahead of talks between world leaders and Tehran in Almaty, Kazakhstan, this week.
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