North Korean leader Kim Jong-un has overseen launches of long-range strategic cruise missiles, calling for the "unlimited and sustained" development of state nuclear combat forces, state media reported Monday. The missile tests came days after Kim inspected an 8,700-ton "nuclear-powered strategic guided missile submarine" under construction in a show of military prowess. The missile launching drills took place Sunday in the Yellow Sea, demonstrating "the absolute reliability and combat readiness of the North's strategic counterattack capability," according to the Korean Central News Agency (KCNA). The strategic cruise missiles flew along the preset flight orbit for 10,199 seconds and 10,203 seconds to hit a target, it said, without disclosing the flight distance. Kim affirmed that North Korea would "as ever devote all their efforts to the unlimited and sustained development of the state nuclear combat force," the KCNA said. He stressed the importance of checking the reliability and rapid response of components of North Korea's nuclear deterrent on a regular basis as Pyongyang is facing va