North Korea Threat: Saber-rattling or the real deal?

With international focus suddenly turning to North Korea's alleged nuclear threats, many are trying to figure out if it is saber-rattling or the real thing.

President Donald Trump has promised "fire and fury" against North Korea and its leader, Kim Jong Un if it follows through with threats to attack the United States, or more specifically, the Pacific territory of Guam.

On Wednesday night's "The Final 5," Jim Lokay welcomed Jamil Jaffer, a former adviser to the Senate Foreign Relations Committee. He's now a cyber security expert at the George Mason Law School for National Security.

Jaffer talked about the threat North Korea could pose, as well as a reminder that the rogue nation has been successful in an attack against U.S. interests before, namely a highly-publicized cyber attack in 2014.

In the video player above, watch Jaffer 's interview on "The Final 5."