The United States has cut off China's Bank of Dandong from the U.S. financial system for laundering money for North Korea, Treasury Secretary Steven Mnuchin said Thursday.It marks the first time that the United States has sanctioned a Chinese lender to curb North Korea's nuclear ambitions."We are committed to targeting North Korea's external enablers and maximizing economic pressure on the regime until it ceases its nuclear and ballistic missile programs," Mnuchin said at a news conference.The Treasury Department said the bank, based in northeastern China on the border with North Korea, "ac…READ FULL ARTICLE