As the United States prepares for historic discussions between President Trump and North Korean leader Kim Jong Un, the Trump administration and its international partners have a lot of work ahead of them.

The world has crossed over to a new nuclear era, where a fateful error -- rather than intentional aggression -- is the most likely catalyst to nuclear catastrophe.

As Congress returns from its August recess, U.S.-Russia relations are in a deep ditch. This is a serious challenge for our governments and a danger to the people of both nations and indeed the world. Getting to safer ground requires urgent action to establish close cooperation between the Trump administration and Congress — by creating a new bipartisan liaison group modeled on one established in the 1980s.

Graham Allison’s impact as Director of the Center has been extraordinary—“impossible to overestimate” in the words of Harvard Kennedy School Dean Doug Elmendorf.

Donald Trump is an apprentice in the nuclear world. Worse, he has no appetite for learning.

George P. Shultz, William J. Perry, Henry A. Kissinger and Sam Nunn authored an Op-Ed in the Wall Street Journal, identifying a series of steps needed to pull the world "back from the nuclear precipice." Belfer Center Director Graham Allison, Co-Director of the Preventive Defense Project Ashton P. Carter, and Managing the Atom Senior Research Associate Matthew Bunn attended the conference at Stanford University's Hoover Institution that developed these steps, and endorsed the Op-Ed.

This is the fifth in a series of videos on nuclear terrorism based on Graham Allison's book Nuclear Terrorism: The Ultimate Preventable Catastrophe. In this episode former Senator Sam Nunn, former Assistant Secretary of Defense Ashton B. Carter, and U.S. Undersecretary of State R. Nicholas Burns discuss nuclear proliferation and the bold action it will take to make sure that these weapons never end up in the hands of terrorists, criminals or rogue states.

This is the fourth in a series of videos on nuclear terrorism based on Graham Allison's book Nuclear Terrorism: The Ultimate Preventable Catastrophe. In this episode, former Senator Sam Nunn, Senior Research Associate in the Project on Managing the Atom Matthew Bunn, and Belfer Center Director Graham Allison discuss the global economic impact of a nuclear detonation. No matter where you live, the repercussions of a nuclear bomb going off anywhere in the world will affect those least able to help themselves.

This is the second in a series of videos on nuclear terrorism based on Graham Allison's book Nuclear Terrorism: The Ultimate Preventable Catastrophe. In this episode, former Senator and co-chair of the Nuclear Threat Initiative Sam Nunn, Belfer Center Director Graham Allison, and Senior Research Associate in the Project on Managing the Atom Matthew Bunn discuss ways in which we might limit the spread of nuclear weapons.