article_snippet.sent: Then more ominously on December 23 last year, computers at the country's nuclear operator were breached.  
article_snippet.sent: Again cybercrime was suspected.
article_snippet.sent: The source of these attacks?
article_snippet.sent: The latest high-profile digital incursion, in December, attempted to steal data from North Korea nuclear operator, including plant blueprints and personnel information.
article_snippet.sent: Though investigators said no critical data was stolen, the attack raised serious concerns about the safety and security of the 23 nuclear power plants the attack runs.
article_snippet.sent: the attack was described by James as a "spear-fishing" exercise where unsuspecting victims -- retired and current employees of the nuclear operator -- were prompted to open up a disguised document in unsuspecting victims -- retired and current employees of the nuclear operator -- email.
article_snippet.sent: From a law enforcement or investigation side, we're trying to actually trace back to who did it," said James.