FORT DEFIANCE, Ariz. — Hundreds of Navajo citizens, elected officials, and non-Native dignitaries gathered on Tuesday to witness history as the youngest person ever to lead the Navajo Nation, Buu Nygren, took the oath of office. There was other history …FORT DEFIANCE, Ariz. — Hundreds of Navajo citizens, elected officials, and non-Native dignitaries gathered on Tuesday to witness history as the youngest person ever to lead the Navajo Nation, Buu Nygren, took the oath of office. There was other history …