Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) - The Sony hack has pulled the curtain back on a dangerous and mysterious branch of the North Korean military: cyber soldiers.
North Korean defectors say they are rigorously trained in the art of destruction and their battlefield can be pretty much anywhere in the world because they wage war from behind a computer screen.
These North Korean hackers are said to be handpicked and trained at a secluded complex in Pyongyang known as 'Bureau 121.' From there, 18,000 agents travel throughout the globe, infiltrating enemy nations, including the United States.
Hemu Nigam, a cybersecurity expert and the former vice president of Worldwide Internet Enforcement for the Motion Picture Association of America, and Gordon Chang, a columnist for Forbes and the author of "The Coming Collapse of China" discuss the cyberterrorism threat on "The Lead."