BREAKING NEWS: TOP HEADLINES DECEMBER 2024 ON ABC WORLD NEWS TONIGHT WITH DAVID MUIR

Good evening and welcome to ABC World News Tonight. I'm David Muir, bringing you the most up-to-date headlines from around the globe.Tonight's top story: A significant breakthrough in the search for a cure for the common epidemic. Scientists at the NIH have made revolutionary discoveries that could revolutionize medicine as we know it. In other n