The traditional owners of the destroyed Juukan Gorge rock shelters say they were disrespected and sidelined in the federal government's formal response.
Mining giant Rio Tinto blew up the 46,000-year-old Juukan caves in May 2020, devastating West Australian custodians and causing global outrage.
Environment Minister Tanya Plibersek on Thursday presented the government's response to a parliamentary report on the incident, labelling the sacred site's destruction "unthinkable" and pledging it will never happen again.
