What are the regional perceptions of Iran's nuclear program? Are the Gulf States obsessed with breakout times and the Arak reactor, or are their concerns more political in nature? Is the United States doing enough to reassure its Gulf Allies about the nuclear negotiations with Iran? Do the Gulfees actually have an Iran nuclear strategy? Today, Aaron and Jeffrey speak with Dina Esfandiary, a research associate in the Nonproliferation and Disarmament program at the International Institute of International Studies, about the regional perceptions of Iran's nuclear program.

Jeffrey Lewis interviews Dr. Lassina Zerbo, Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBO). They discuss the CTBTO's monitoring system and the future of the CTBT.

Jeffrey Lewis interviews Dr. Lassina Zerbo, Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBO). They discuss the CTBTO's monitoring system and the future of the CTBT.

How will the West verify a nuclear deal with Iran? Jeffrey Lewis talks to the Christopher Bidwell of the Federation of American Scientists, about a new report entitled "Verification Requirements for A Nuclear Agreement with Iran." Jeffrey and Chris discuss how much Iran should disclose up front about its past nuclear activities.

Did Vladimir Putin just threaten the West with nuclear weapons? Could nuclear weapons be used in Europe? What is Russia's nuclear doctrine? Does a nuclear balance make the world safe for conventional war? That is to say, if two states have nuclear weapons, might they feel safe enough to fight low-level conflicts more often? Today, Aaron and Jeffrey talk about Russia's nuclear weapons and the recent chatter about them in Moscow.

What is the status of China's and the United States' hypersonic weapons programs? What can open source tell us about China's most recent rest? What happened at Zodiak Island? And why were Jeffrey and James searching for resorts in Mongolia? Today, Jeffrey and Aaron speak with James Acton, a senior associate at the Carnegie Endowment, about hypersonic weapons.

Are NATO based nuclear weapons an advantage in a dangerous world? Or are they an expensive and obsolete weapon that undermine NATO burden sharing? Is NATO divided about US nuclear weapons in Europe? Are the weapons secure? Are Euro-Hippies a threat to world peace? Today, Jeffrey and Aaron discuss Brent Scowcroft, Stephen Hadley, and Frank Miller's recent op-ed in the Washington Post about US nuclear weapons based in Europe.

What are the implications of the spread of hit-to-kill? What are the differences between ground based missile defense interceptors and anti-satellite weapons? Why is China continuing to develop ground based anti-satellite weapons? Why did the US feel the need to shoot down its own satellite, USA-193, in February 2008? And what are the implications of the spread of hit-to-kill for space security? Today, Aaron and Jeffrey talk about anti-satellite weapons, the spread of hit-to-kill, and the need for a general code of conduct for ASATs.

What should we make of the United States' conclusion that Russia has violated the INF? What do we know about the violation? What is the substance of the State Department's arms control compliance report finding? What do we know about the supposed ground launched cruise missile alleged to have violated the Treaty? How does the GLCM differ from the RS-26? Does this have anything to do with Ukraine? And what should the United States do about the alleged violation? Today, Aaron and Jeffrey talk Russian missiles, the INF, and Obama's policy options.

What open source information is out there about the MH17 shootdown? Do the rebels have the Buk missile system that reportedly downed the aircraft? How has open source analysis helped analysts fact check the Kremlin's claims about the shooting down of MH17? And what does all of this have to do with a billboard? Today, Aaron and Jeffrey talk all things open source and the downing of MH17.