A mystery missile at North Korea's military parade should make the US worried

Justin Bronk, a military expert at the Royal United Services Institute, told Business Insider that North Korea's mystery missiles looked "enormously like Iskander missiles" and were not ones that North Korea had "been seen with before."Bronk pointed out that Russia has a history of helping North Korea with its missile program. Talented engineers left unemployed after the collapse of the Soviet Union and often found good-paying work in North Korea, Bronk said.