John S. Park, Stanton Nuclear Security Junior Faculty Fellow at the Massachusetts Institute of Technology and Project on Managing the Atom Associate, argues that cooperation between North Korea and Iran has been a critical—yet underexamined—enabler of North Korea's recent success. He concludes that the time has come for the United States to view the two previously independent missile programs as two sides of the same coin and recommends strategies for disrupting the procurement channels between Iran and North Korea.

"Beijing viewed North Korea's explosion of a nuclear device in October 2006 as not only an act of defiance to the international community and a threat to regional stability, but also an act of defiance toward China. Chinese officials admit that their toolbox for managing the North Korean nuclear weapons challenge must now include a combination of pressure and inducements."

Despite extensive diplomatic efforts to facilitate the six-party talks, domestic policy constraints, differing priorities, and conflicting historical analogies among each of the countries have brought vastly differing perspectives to the multilateral negotiating table.