North Korea conducts test for missile it claims can target US mainland

North Korea connected Sunday conducted a rocket trial for an upgraded solid-fuel motor it says tin scope the U.S. mainland, according to authorities media.  The state reported the engine’s maximum thrust is 2,500 kilonewtons, noting an summation from a 1,970 kilonewtons trial successful September, according to the authoritative Korean Central News Agency.  The trial took…