Dr. Tessy Ojo, CEO of The Diana Award, tells PEOPLE that Prince William and Prince Harry mirror their mother, Princess Diana, and her ability to go “where the pain was.”

Prince Harry is currently in New York City for the United Nation’s Climate Week, but he’s still making time to check in with his family back home. On Monday, during an event honoring his later mother,

"My mother would have been horrified that anyone’s children or grandchildren would live in a world still infested with mines.”