US President Donald Trump has said he will hold a second atomic summit with North Korea's pioneer Kim Jong-un in Vietnam on 27-28 February.
The two heads face various difficulties as they get ready for the gathering.
Test 1: Getting past the pomp
Both Donald Trump and Kim Jong-Un took advantage of the press party encompassing their arranged compromise at the Singapore summit in June 2018.
Maybe they could pretty much pull off breaking the ice at that notable gathering.
Be that as it may, the ambiguously worded explanation it delivered hasn't brought about any solid activity towards the US objective of destroying North Korea's atomic weapons, and Pyongyang is baffled by Washington's refusal to ease sanctions.
So the weight's on for them to think of something substantial.
North Korea's rocket and atomic program
When Trump met Kim: What occurred straightaway?
The trouble here is that they've customized the atomic encounter: they like to manage each other straightforwardly, and have done as such by trading letters and warm words.
The worry in Washington is that this course of action works preferable for Mr Kim over for his friend through correspondence Mr Trump - the president broadly prefers to depend on his senses, while the director has aced the brief.
The answer for that is working-level arrangements to deal with subtleties before the summit.
That didn't occur last time, yet it is going on now.
A genuine accomplishment would be a summit understanding for a structure to prop them up at the master level.
Test 2: Getting in agreement
At the Singapore summit, the US and North Korea consented to the "total denuclearisation of the Korean landmass".
However, they didn't state what that implied, which gets to the core of whether an arrangement is even conceivable.
For the US denuclearisation includes North Korea singularly surrendering its whole atomic weapons stockpile and permitting confirmation by global assessors.
For North Korea it implies that America take "equal" steps pulling back its capacity to undermine Pyongyang with atomic military in the district.
Quite a bit of that is non-debatable for the Americans, yet maybe not all.
President Trump, to the dismay of his commanders, has clarified he might want to bring home US troops positioned in South Korea, in spite of the fact that he has said he has no plans to do as such right now.
Whatever the case, Kim Jong-un has not formally dedicated to a composed meaning of denuclearisation. Specialists state he ought to be pushed to do as such, and to consent to an itemized guide of how to arrive.
That is a genuine test.
In any case, a week ago the express office's North Korea emissary Stephen Biegun at any rate recognized the distinction over demilitarization objectives, and said going to a concurrence with the North Koreans would need to happen "after some time".
Test 3: Getting activity on denuclearisation
Signs from the two sides have raised desires for some activity at the summit.
Pyongyang has offered to demolish every one of its offices for making atomic bomb fuel, as indicated by Mr Biegun, if the Trump organization takes "comparing measures".
Kim Jong-un has broadcast that these would need to include some type of authorizations help, and some type of security ensures, for example, a presentation formally finishing the Korean War.
The Americans appear to diminish their requests for noteworthy denuclearisation steps forthright, evidently embracing a greater amount of the activity for-activity approach upheld by Mr Kim.
There are reports of an arrangement including halfway authorizes help in return for a stop on North Korea's atomic and rocket weapons creation (Pyongyang has halted the testing, yet not the generation).
The test is guarantee this would prompt solid strides for destroying the atomic weapons North Korea as of now has.
The worry here is that Mr Trump may strike an impromptu interval bargain without an unmistakable way to denuclearisation.
Test 4: Getting practical?
For all intents and purposes anybody in Washington who knows anything about North Korea imagines that Kim Jong-un won't relinquish his atomic weapons program.
It's too imperative an obstacle, chief of national knowledge Dan Coats told a senate board of trustees a week ago. He said the nation's chiefs "at last view atomic weapons as basic to routine survival", particularly against a US endeavor to oust it.
Rather, specialists trust Mr Kim is endeavoring to make the discretionary atmosphere vital for North Korea to be acknowledged as an atomic state.
He made some captivating proclamations in his New Year's Day discourse, announcing that Pyongyang would neither make nor multiply atomic weapons as a feature of its pledge to denuclearisation.
Some previous Pentagon authorities venture to such an extreme as to contend that it would bode well to seek after discourse on arms control, instead of arms disposal.
In any case, numerous examiners reason that advancement on denuclearisation won't be conceivable except if the routine feels secure, and Kim Jong-un can be persuaded he needn't bother with his atomic weapons to clutch control.