jong-un. however, ahead of the historic summit with the north korean leader, we know he'll be meeting with south korean president moon jae-in at the white house on may 22nd. >> meanwhile, the status of the americans in north korea is still unclear. president trump hinted they may be released there soon. you'll remember giuliani said midweek that they were going to be released on thursday. cnn international correspondent alexandra field is live in seoul. what do we know about the summit? >> reporter: you heard the president say a date and time has been set. it isn't clear when he'll reveal what the location is. certainly the administration has suggested that they would look at the dmz. they threw some weight behind the idea of doing it there, that would be an optimal place from the optics perspective. there's also been talk about hosting this summit in singapore, a more neutral location. again, the announcement has not yet been made. still the plans for the summit are continuing forward. the korean national security chief traveled to washington, d.c., to meet to discuss that