CNN  —  Prince Harry traveled to Angola earlier this week and met the country’s president to discuss demining efforts, almost three decades after his mother’s memorable visit to the south African nation. The Duke of Sussex shared his vision of a “mine-free country” in an audience with Angolan President João Lourenço on Tuesday, according to the international NGO, the HALO Trust. “We thanked him [Harry] for his extraordinary dedication to and investment in the vision of a mine-free country, and