Firsthand accounts of survival and resilience, direct from those who lived through the Oklahoma City bombing. #OklahomaCityBombingOneDayInAmerica is now streaming on Disney and Hulu. | National Geographic TV

Sunday marks the 25th anniversary of the tragic bombing of the Alfred P. Murrah building in Oklahoma City, April 19, 1995. The #OKGuard, alongside local authorities and agencies from across the state and nation, responded to the heart of #Oklahoma in a time that changed our state forever. Our hearts are with the 168 lives lost, their loved ones, and all of those injured. We will #NeverForget that fateful day. #OKCBombing #AlfredPMurrah #WeRemember | Oklahoma National Guard

At 9:02 a.m. on April 19, 1995, a bomb exploded in a truck parked at the north entrance of the Alfred P. Murrah Federal Building in downtown Oklahoma City, killing 168 people and injuring approximately 850 in the worst single act of domestic terrorism in the U.S. at the time. Now, victims, witnesses, and first responders give their accounts of what happened. Watch Oklahoma City Bombing: One Day in America on Sunday April 6th at 9pm on National Geographic UK. | National Geographic UK