President Donald Trump is set to meet North Korea's Kim Jong Un in less than three weeks, yet the biggest question hanging over the leaders' second summit is why they're even having it.
Since their historic face-to-face meeting in Singapore eight months ago, North Korea has made little progress toward giving up its nuclear weapons and continues to do what it can to evade sanctions. The top U.S. negotiator with Kim's regime acknowledges that the two sides still don't agree on what denuclearization might look like or what the U.S. might offer to satisfy him.
Those gaps underscore just how far apart the two sides remain as the clock ticks toward Trump's second summit with Kim, set for Hanoi on Feb. 27 and 28. The differences have led many of Trump's critics to argue that the second summit will look a lot like the first, which produced a vague set of principles but little tangible progress.