Prince William is visiting with some of New York's most courageous citizens. On Tuesday, the Prince of Wales, 41, visited an FDNY firehouse as part of his two-day visit to New York City. While the majority of William's international travel revolved around his Earthshot Prize and other environmental causes, as well as talks at the United Nations, the firehouse visit revolved around another subject near to his heart: the mental health of first responders.