president trump claimed that site had been dismantled. paula is following there for us. what are we learning? >> reporter: dave, we know the u.s. president has been warning north korea about that test, saying that north korea knows it has much to lose. in fact, everything, if it does decide to carry on with hostile acts. this was after the weekend. we saw from north korea a test they said was successful and important and could change the strategic position of north korea. they haven't specified what it is at this point. experts looking at satellite images believe it could be a rocket engine test, which could help with, either a satellite launch or an icbm, an intercontinental ballistic missile. we have had a statement from north korea. this is from kim jong-un, the negotiator in the oval office with president trump, handing over those so-called love letters, from kim jong-un. he has said and slammed what