mathieu? >> we've got 11% of people here who think furkss are re -- ufosl but don't think aliens have visited work. where is the boundary there? unidentified according to who? there are a lot of things i can't identify in the sky but i assume somebody can. >> this is true, this is true. yeah, the ipsos polls, the wording isn't great. the way that the ipsos poll explains that is not that there's an 11% difference between those who believe ufos are an extraterrestrial phenomenon, what gets commonly referred to as the extraterrestrial hypothesis that ufos are real and alien-related. the difference is 56% believe ufos are real, 11% fewer believe that some of those ufos have landed and we've had contact with the aliens. that's the differential that's playing out there. the differential between something else going on, right, is that 56 going up to 71% from the '90s, the idea that there is something going on with this question. and that idea that there is something going on has a long history. this

joining me for insight and analysis, nbc news white house correspondent kristin welker, mathieu continetti of "usa today's" washington bureau, chief susan page, and eddie glaude of princeton university. welcome to sunday. it's "meet the press." >>> from nbc news in washington, the longest running show in television history celebrating its 70th year. this is "meet the press" with chuck todd. >>> good sunday morning. we'll get to the latest on the flooding in texas and the recovery in a moment, but we begin with very big news overnight while you were sleeping. north korea carried out its sixth nuclear test and claims it has detonated a hydrogen bomb that they say could be mounted on a intercontinental ballistic missile. whether or not it was a hydrogen bomb or a larger version of the previously tested atomic bombs, south korea's defense ministry says the explosion was five or six times as powerful as the last test the north conducted. this comes amid increasing tensions and elevated rhetoric between north korea and the united states with president trump. last month warning of fire and fury i