so i think this will be a big boon for the security software industry as well. >> nicole perlroth thank you for your report energy "the new york times" and ken stasiak. thank you both. >> thank you so much >> woodruff: finally tonight, an unusual look inside the isolated kingdom of north korea. while little is known by outsiders about daily life in the country. some journalists and activists are now smuggling secret videos shot by a network of north koreans who are risking their lives to show the world what's going on in their country. some footage obtained by japanese journalist jiro ishimaru is featured in tonight's frontline on pbs, "secret state of north korea." here's an excerpt. >> these are pictures we want the world to see. north koreans living n. towns across the country. they risk their lives to get the footage. one of his contacts is it a states employee, but has been smuggling footage out for five years. he agreed to speak if his identity was concealed >> (translated): this is dangerous, and if i get caught, i know i'd immediately be executed as a traitor to the korean peopl