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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Frank Klotz discusses France's new defense white paper and its implications for France's nuclear policy.

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 Administration has given the Syrian opposition more than six hundred and fifty million dollars in nonmilitary aid, but Obama has consistently opposed arming the rebels or intervening militarily on their behalf. The United States has taken a tenuous position: not deep enough to please the rebels or its allies in Europe, or to topple the regime, or to claim leadership in the war's aftermath—but also, perhaps most important, not so deep that it can't get out.

Obama is right not to rush to war, given our checkered past on the use of chemical weapons and the sinkhole of hatreds in Syria, writes Leslie H. Gelb.

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.

Secretary of State John Kerry spoke on April 12, 2013, at the American Chamber of Commerece in Seoul after his meetings with South Korean President Park and South Korean Foreign Minister Yun. He discussed economic cooperation between the Republic of Korea and the United States and nuclear issues in the region.

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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Scott A. Snyder outlines five things to know about the increase in threats from North Korea.

The success of a UN investigation into an alleged chemical weapons attack in Aleppo province last week will depend on a number of factors and could prove inconclusive, says CFR's Gregory Koblentz.

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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Secretary of Defense Charles Hagel held a press briefing on March 13, 2013, to announce increased missile defense operations to prepare for possible attack from North Korea or Iran. North Korea's Supreme Command has recently released threatening statements.

The Six-Party Talks serve as a forum for the denuclearization of North Korea, but analysts say the negotiations have been hindered by Pyongyang's belligerence and the shifting priorities of participating nations.

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