North Korea seems to be insisting on two conditions for the U.S. summit it believed to have been previously established: U.S.–South Korea exercises will exclude threatening military power, and the U.S. will enter denuclearization negotiations in good faith.

On April 27, 2017 John S. Park testified before the House Committee on Financial Services.

In this op-ed for the New York Times, former MTA Executive Director James Walsh and MTA Faculty Affiliate John S. Park argue that, though American diplomats should be proud of the new sanctions on North Korea that the United Nations Security Council passed last week, the key to stopping North Korea's weapons program is completely dismantling the private Chinese firms that help import illicit goods, through cooperation between the United States and China.

"At no point in the history of U.S. nonproliferation and counterproliferation policy have financial sanctions been so central to U.S. efforts to prevent or rollback the acquisition of nuclear weapons in countries such as North Korea and Iran. Despite this crucial role, financial sanctions have been examined almost solely from the sender’s perspective, that is, the country imposing the sanctions. Few focused policy analyses have measured the effects of these instruments from the target’s perspective..."

With origins dating back to the late 1960s, North Korea’s nuclear weapons program has evolved to be a multipurpose instrument of the regime’s security strategy.This book chapter presents a new framework of analysis to explore North Korea’s evolving use of its nuclear arsenal and implications for both the Korean Peninsula and U.S. policy.

Kim Jong-eun's New Year's Day address signaled a willingness to ease tensions with South Korea and focus on economic development, but how credible is this message? Project on Managing the Atom Associate and MIT Stanton Nuclear Security Junior Faculty Fellow John Park analyzes the address in an HKS PolicyCast.

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.

This chapter examines the relationship between security assurances and North Korean nuclear decision-making by focusing on four key areas: key geopolitical shocks that had a major impact on the North Korean regime; main sources of security assurances for North Korea over its history; this volume's hypotheses on security assurances based on how North Korea reacted to geopolitical shocks; and conditions under which security assurances may be most effective in dealing with North Korea in the future.

John Park, a senior research associate at the U.S. Institute of Peace and currently a visiting fellow with the Belfer Center's International Security Program/Project on Managing the Atom, recently sat down with for a one-on-one interview where he talked about his work with the Center and his contributions to the Seoul Nuclear Security Summit.