Support WBURSecurity Expert: U.S. 'Leading Force' Behind StuxnetPlay04:23Download AudioTom GjeltenSeptember 26, 2011 ShareGerman cybersecurity expert Ralph Langner warns that U.S. utility companies are not yet prepared to deal with the threat presented by the Stuxnet computer worm, which he says the U.S. developed. (Courtesy of Langner Communications)