North Korea's Hero Kim Kun Ok sub conducts possible first at-sea SLCM tests

North Korea claims it test-fired two types of submarine-launched strategic cruise missiles, potentially from the modified Romeo-class 'Hero Kim Kun Ok' (with a VLS 'turtleback' and torpedo-tube launch options). If confirmed, this would be the first publicly evidenced at-sea weapons trials from this new missile-sub platform, indicating progress toward operational deployment of a nuclear-capable undersea strike capability.