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.

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.

Op-Ed by Sam Nunn, William J. Perry, and Eugene Habiger in The Washington Post