U.S. President Donald Trump became the first sitting U.S. president to set foot in North Korea on Sunday when he met its leader, Kim Jong Un, in the Demilitarized Zone (DMZ) between the two Koreas and agreed to resume stalled nuclear talks.

North Korean leader Kim Jong Un told Russian President Vladimir Putin peace and security on the Korean peninsula depended on the United States, warning that a state of hostility could easily return, North Korean media said on Friday.

Talks signal leaders are ready to cooperate as both confront fraying relations with U.S.

Kim Jong Un will visit Russia for a summit with Russian President Vladimir Putin, North Korea state media have confirmed.

In the wake of the Trump-Kim Summit, the US and the North Korean sides must undertake some deep reflection and must maintain contact. All is not yet lost. Recovery from the setback is possible and desirable.

Kim Jong Un’s secretive train journey from North Korea to Vietnam ultimately represents a win for China. Traversing the entire country, Kim had only to look out the window to realize that China is a viable alternative to the US when it comes to brokering political survival.

It seems that North Korea and the United States both harbor misjudgments about the other’s views on denuclearization, and neither has fully prepared for the responsibilities that come with denuclearizing. All the while, the window of time for fruitful negotiations in the future is narrowing.

North Korean leaders carefully cultivated the tone of the recent 70th anniversary celebrations to avoid antagonizing both Beijing and Washington. This could offer reason for cautious optimism regarding the continuing negotiations, but significant remaining differences in U.S. and North Korean aims and expectations should temper any early celebrations.

The initial steps that Kim and Moon have taken are encouraging, and they provide the foundation for a lasting peace on the Peninsula. But they are just initial steps, and many thorny obstacles remain.

North Korean leader Kim Jong Un visited China and met President Xi Jinping, state media of both countries said on Tuesday, their second encounter in two months in a flurry of diplomatic engagement that has eased tensions on the Korean peninsula.