The United Nations (UN) is to mark the 75th anniversary of its founding amid the ruins of World War II with a large online event on Monday, UN Secretary-General Antonio Guterres has said. Guterres is expected to deliver in-person, remarks in the gilded General Assembly Hall, while world leaders, including U.S. President Donald Trump and German Chancellor Angela Merkel, will deliver pre-recorded video speeches. “It’s very unfortunate but it’s going to be a pretty gloomy birthday celebration for the UN,” UN expert Richard Gowan from the think tank Crisis Group said. Leaders...