WASHINGTON, United States (AFP) — The United States formally concluded Tuesday that North Korea ordered the murder of a half-brother and potential rival to ruler Kim Jong-Un with the banned VX nerve agent. “This public display of contempt for universal norms against chemical weapons use further demonstrates the reckless nature of North Korea and underscores that we cannot afford to tolerate a North Korean WMD program of any kind,” State Department spokeswoman Heather Nauert said. […]