The video would be viewed more than 23 million times, making it perhaps the most watched footage of the Afghan war. It began last April when U.S. Army Pfc. Ted Daniels pressed the record button on his helmet camera.

The device captured what he could see: a rocky Afghan hillside dotted with shrubs and boulders, a small village and no place to hide.

It also recorded sound: The pop, pop, pop of gunfire, and then Daniels' voice.