Portugal’s António Guterres was sworn in Monday as the ninth U.N. secretary-general. “The United Nations needs to be nimble, efficient and effective,” Guterres told member states. “It must focus more on delivery and less on process; more on people and less on bureaucracy,” he said. The 67-year-old former prime minister (1995-2002) and U.N. refugee chief (2005-2015)…