to the supreme leader. on the front page of the main state newspaper, kim jong-un signing the order to what the region em calls a hydrogen bomb. they question the claim. but there is no doubt among these students lined up outside science and technology center that north koreans foreign media to visit the building. >> a siymbol of science. >>ly wan believes this nuclear test ensures peace, even if much of the world call it is a dangerous provocative act. >> only for the -- >> do they wants to be friends with north americans? >> why not. >> it makes that impossible. years of isolation gan during the previous kim region eems. young future scientists, doctors and other students have little or no access to the internet. only a state controlled intranet. >> you see them doing research here in the library. they're using their version of