>> reporter: we >> well, they say they don't have anything specific that they can confirm at this point, so they're obviously analyzing the information as well to try to figure out what exactly it was that north korea has tested. they have said it was crucial. they have said it was very successful and part of a nuclear deterrent. the very fact that it's the second test is significant. this is a missile launching site, and it's the one that u.s. president donald trump had said he promised him he would shut down. there was satellite imagery proving he was dismantling this area. earlier this year there was satellite imagery proving it was being rebuilt once again. it shows once again how the relationship between the u.s. and north korea is deteriorating. we're seeing more rhetoric as well between the two leaders.