they were seeing friday night when a shimmering, ghostly trail lit up the sky above l.a. it was actually a spacex rocket taking off from an air force base in santa barbara. spacex ceo elon musk stoked the flames on twitter, tweeting "nuclear alien ufo from north korea," but that wasn't the only thing soaring through the air this weekend. we want to show you what the big guy is up to here on christmas eve. norad's santa tracker. and i believe he is over -- i can't quite see -- headed to turkey right now, i'm told by our executive producer, and we are watching him make his way with his reindeer to deliver presents all around the world. and the president next hour is set to talk to norad about santa, and we will, of course, be watching that. thank you so much for joining us this hour. there is much more to come this afternoon. richard lui picks up our coverage coming up at the top of the hour. msnbc will be back right after