Donald Trump and Kim Jong-un are poised to meet in a historical summit in Singapore on Tuesday. The event will begin with a one-on-one meeting between the two leaders and then proceed to a working lunch with key officials and experts on both sides. The summit will conclude in the evening and President Trump is expected to leave by 8 p.m.

For all the media hype of a seminal historical moment, the summit will be very brief. But it’s this brevity that will increase its chances of success, at least from a public relations point of view. If the devil’s in the details of denuclearization, then it’s unlikely that he’ll be making the trip to Singapore.

Here are some of the key considerations surrounding the Trump-Kim summit: