Ceri Isfryn, director of National Geographic's "Oklahoma City bombing: One day in America," shares how the docuseries honors the legacy of the tragic attack that took place thirty years ago. Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News Digital is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7