The final chapter of our Vietnam journey — three weeks of incredible sights, food, and stories before heading home.

The horrifying photograph of children fleeing a deadly napalm attack on June 8, 1972, has become a defining image not only of the Vietnam War but the 20th century.

It drove home the consequences of the Vietnam War to readers in the United States, where it won a Pulitzer Prize. But who took the photo, widely known as Napalm Girl?