A son walked the same dusty path as his mother, separated by 22 years, as Prince Harry took up Princess Diana’s campaign to draw attention to a crisis that has spanned generations in Angola.

The prince retraced his mother’s steps in Huambo, Angola, on Friday — through what was a live minefield in 1997, when Diana put on a protective vest and visor to highlight the danger of mines around the world.

At the time, her path was lined by tall grasses and red signs warning of danger with a skull and crossbones. Since then Angola’s long civil war has ended, and the field has been cleared and transformed into a suburban street. The only remaining landmark is a tree where Prince Harry paused on Friday for a moment of silence.

“It has been quite emotional retracing my mother’s steps along this street 22 years on,” he told a crowd in Huambo, “and to see the transformation that has taken place from an unsafe and desolate area into a vibrant community of local businesses and colleges.”