succeed nef launching a satellite in the future. >> reporter: people expressing their absolute devotion and confidence to this country's leaders, past and present. and now, everyone is just on their way home and they are still, still coming through the streets. >> richard engel in pyongyang. with me now here, korea expert at georgetown university victor cha, also the asia director at the national security council, traveled to pyongyang and also the author of the new book "the impossible state, north korea past and future." victor, you and i were both in north korea together. we see a very different north korea now as this young leader tries to establish his credibility, but this enormous embarrassment of a failed rocket test, another failure. the white house is suggesting that the failure was because of sanctions because they've not been able to get advanced guidance systems that a lot of the things that they need for these tests are just not available to them any longer. >> i think that may be true.