Harry, who is royal patron of the Halo Trust, an anti-land-mine charity his mother also supported, called on world leaders Tuesday to rid the world of land mines by 2025. Harry made the highly emotional plea to mark International Mine Awareness Day.
"Twenty years ago, in the last months of her life, my mother campaigned to draw attention to the horrific and indiscriminate impact of land mines,” Harry, 32, said during a reception at Kensington Palace on behalf of the Mines Advisory Group (MAG) and the Halo Trust.
Harry acknowledged the controversy surrounding his mother's historic visit to the minefield in his speech.
"At the time, the attention my mother brought to this issue wasn’t universally popular. Some believed she had stepped over the line into the arena of political campaigning," he said. "But for her this wasn't about politics, it was about people."
Harry implored people to act and reminded them that there is still much work to be done.
"My mother had been shocked and appalled by the impact that land mines were having on incredibly vulnerable people and on children in particular," he said. "She did not understand why more people were not willing to address the cause of so much suffering."
He continued, "She heard how people in these communities lived in constant fear that each step may be their last. She met with those who had suffered life changing injuries as a result of anti-personnel mines. She listened to their stories and helped share them with the world.”
A Kensington Palace spokesman said of Tuesday's speech, "In the year marking the 20th anniversary of the princess' death, Prince Harry is pleased to have this moment to recognize the significant contribution his mother made in this field."