Carolyn M. Leddy argues that the new U.S. Nuclear Posture review is "an opportunity for Obama to correct his errant disarmament course with a healthy dose of post-Cold War reality."

This timeline looks at the history of U.S.-Russia arms control milestones from 1949 to present.

Paul Kerr and Mary Beth Nikitin of Congressional Research Service examines the motivations behind Pakistan's nuclear program and the direction it's moving toward.

Micah Zenko and Michael A. Levi argue that the United States must change how it handles its nuclear arsenal.

The international community must understand that economic sanctions and diplomatic action alone will not prevent Iran from acquiring nuclear weapons, writes Micah Zenko.

Expert David Albright, says the preliminary agreement by which Iran will ship its low-enriched uranium to Russia for further processing "allows time for negotiations" to get Iran to freeze its nuclear program but warns Iran might still block the implementation of the plan.

In Comparative Connections, Scott A. Snyder and See-won Byun review recent developments toward North Korea's denuclearization.

Despite concerns over Iran's nuclear program, the Obama administration has assessed that Tehran is years from a developing a long-range missile capable of delivering a nuclear weapon. But past Iranian secrecy and testing bombast have led some experts to remain skeptical of Tehran's capabilities and ambitions.

Amid Tehran's fresh assertions of its right to pursue uranium enrichment, CFR's Ray Takeyh says the widening split in Iran's political system casts greater doubt on prospects for nuclear talks with the West.

George Perkovich, an expert on nuclear policy, says despite the world's revulsion at the apparently staged elections in Iran, the United States should be prepared to talk to the Iranian government.

Micah Zenko makes the case, "Unless Tehran responds by late September to international proposals on its nuclear program, history strongly suggests the Israelis will act alone."

Christopher Clary argues that while much of the fear over Pakistan nuclear capabilities is misplaced, policymakers in Islamabad, Delhi, or Washington should not be complacent.

Mark Fitzpatrick, a nonproliferation policy expert on Iran, says the chance exists that in the aftermath of Iran's disputed presidential election, a "new need for legitimacy could make it more willing to accept some tactical compromise" to resume talks.

Matthew Fuhrman discusses the link between peaceful nuclear cooperation and the spread of nuclear weapons.

The co-chairs of the CFR-sponsored independent task force on U.S. nuclear weapons policy outline their recommendations on how to ensure the safety, security, and reliability of the U.S. deterrent nuclear force, prevent nuclear terrorism and strengthen the nuclear nonproliferation regime.

North Korea's nuclear test raises new concerns about its nuclear capabilities, regime succession, and the limits of both international pressure and engagement. Four experts address the policy options available to influence Pyongyang.

Scott A. Snyder discusses China and sanctions against North Korea.