A first-of-its-kind full-size 3D rendering of the Titanic wreckage has revealed new insights about the ship's final moments. David Muir shares details on the new Nat Geo special and the minute-by-minute timeline the team reconstructed. https://abcnews.link/FJQXSLJ?utm_source=facebook&utm_medium=social&utm_campaign=dhfacebook&utm_content=app.dashsocial.com/abcworldnewstonight/library/media/520620381 | ABC World News Tonight with David Muir