The United States has long struggled with how to manage Iran's nuclear ambitions. Any U.S. military option in Iran is likely to be dynamic, depending on its objectives.

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According to Meghan O'Sullivan, U.S. action in Syria may have implications for Iran and its nuclear program.

Iran's nuclear ambitions are likely driven by multiple factors, from security concerns to domestic polices. However, political competition within Iran, rather than Israel's nuclear capabilities, plays a more significant role in driving Iran's nuclear ambition.

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Since North Korea conducted its latest nuclear test in February 2013, a spiral of heightened international pressure and increasingly threatening provocations by Pyongyang has ensued.

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The United States tried to convince Israel to join the Non Proliferation Treaty (NPT) when the treaty was first introduced and before it was widely believed that Israel had nuclear weapons. The NPT's objective is to prevent the spread of nuclear weapons and weapons technology and further the goal of universal disarmament.

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The five permanent members of the United Nations Security Council, China, France, Russia, the United Kingdom, and the United States, are five nuclear-weapon states that have signed the Nonproliferation Treaty (NPT). As the P5, they meet regularly to work toward nuclear disarmament and nonproliferation.

Some argue that the best way to restrain North Korea is to strengthen sanctions, principally by putting more pressure on China to reduce its trade with North Korea. Others advocate a diplomatic approach and argue that engagement, not escalation, would be more effective. What all parties need to remember is that actions speak louder than words.

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Ray Takeyh warns that the West is falling into a diplomacy trap set by Iranian clerics regarding the nuclear Non-Prolifieration Treaty (NPT).

North Korea's ratcheting up of tensions requires South Korean and U.S. military forces in Korea to be prepared to defend against North Korean military incursions. Resumption of diplomacy will only be possible when North Korea signals it is ready to resume dialogue and all parties agree on an agenda that includes both tension-reduction and denuclearization.

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Since the discovery of illicit Iranian nuclear facilities in 2002, the United States has sought to mobilize an international coalition to address the Iranian nuclear challenge through various coercions and incentives. UN member states agree that Iran is entitled to a civilian nuclear program for purposes of energy generation, but they require assurances that such a program is not going to be misused for military purposes.

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Ray Takeyh calls for "a more imaginative re-conceptualization of the existing diplomatic paradigm," between the United States and Iran.

IAEA Director General Yukiya Amano gave these remarks to the Board of Governor on March 4, 2013, to open IAEA's first meeting of 2013. As mentioned in the press release and Amano's remarks, the meeting will discuss the Fukushima nuclear accident, nuclear safety, nuclear energy, and safeguards in North Korea and Iran.

World powers are now offering to ease sanctions on Iran if it agrees to halt its most sensitive nuclear activity. Expert Daryl Kimball urges a full diplomatic press to stop Iran from crossing the nuclear weapons line.

In the nuclear dispute between Iran and the United States, a grand bargain is unlikely given the level of mistrust between the two parties. What's more realistic is a modest compromise that breaches the wall of mistrust and potentially sets the stage for further-reaching arms control measures, says Ray Takeyh.

Foreign policy has not played a major role in the presidential campaign so far, but a close race could make it a factor in courting "the moveable middle," says CFR's James Lindsay.

This week's latest round of Iran talks seems to have done little to reconcile the two sides on the country's nuclear position, says CFR's Michael A. Levi.

This week's nuclear talks ended without resolving the issue of uranium enrichment, leaving Iran to potentially face tougher sanctions, says CFR's Ray Takeyh.

A panel discussion marking the release of CFR's new ebook, Iran: The Nuclear Challenge. The essays in this volume, all authored by fellows in CFR's David Rockefeller Studies Program and edited by Robert Blackwill, inform readers on how, not what, to think about Iran's nuclear activities.

A panel discussion marking the release of CFR's new ebook, Iran: The Nuclear Challenge. The essays in this volume, all authored by fellows in CFR's David Rockefeller Studies Program and edited by Robert Blackwill, inform readers on how, not what, to think about Iran's nuclear activities.