Satellite photographs and other intelligence gathered by U.S. officials provide what they say is detailed evidence of at least six Chinese-owned or -operated cargo ships violating United Nations sanctions against North Korea. The U.S. compiled the information from Asian waters as part of the Trump administration’s strategy to pressure North Korea into giving up its nuclear weapons and long-range missiles. The effort identified the ships by name and tracked their movements. The ships either entered ports in North Korea and transported what U.S. officials concluded was illicit cargo to Russia and Vietnam or made ship-to-ship transfers at sea. According to the U.S., which presented the information to a U.N. sanctions committee, the ships also made extensive maneuvers designed to disguise their violations of the U.N. sanctions. In August, the Security Council banned North Korean exports of coal, iron ore, lead and seafood, which have generated an estimated $1 billion […]