now, even though we're learning more about marquez, there's questions here in san bernardino about what happened with those shooters. there's about 18 minutes of missing tape where the fbi cannot determine exactly where they were and they have now called on the public asking for videos, surveillance footage to account for their whereabouts. thomas? >> morgan radford there in california, thank you. want to return to breaking news, something we've been following here all day on msnbc and that's north korea claiming to have successfully tested a hydrogen bomb. also, we are going to discuss the impact this claim is having on markets here in the u.s. and all across the globe. i'm mary e and i quit smoking with chantix. i have smoked for thirty years and by taking chantix, i was able to quit in three months. and that was amazing. along with support, chantix (varenicline) is proven to help people quit smoking.