The ICBM launched Thursday flew higher and for a longer duration than any other weapon North Korea has tested. As the transporter-erector launchers get bigger, their mobility decreases," Lee Sangmin, an expert at South Korea's Korea Institute for Defense Analyses. Lee Illwoo, an expert with the Korea Defense Network in South Korea, said North Korea may have developed a larger missile to carry bigger and more destructive warheads or multi-warheads. If that's the case, Lee said North Korea could have used liquid fuels as they generate higher thrust than solid fuels. watch nowLee said North Korea may have placed a dummy, empty warhead on the Hwasong-19 to make it fly higher.

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Persons: Kim Jong Un, Kim Ju, Kim Jae, Lee Sangmin, Chang Young, Chang, Lee Illwoo, Lee, they're Organizations: Yongsan, North, Getty, Korean Central News Agency, South Korea's Korea Institute for Defense, Seoul's Korea Research Institute, National, Korea Defense Network, Korea's Locations: Seoul, North Korea, Korea, North Korean, South, Korean, South Korea, U.S, Japan