Tuhia he haere tonu mō tēnei wāhanga - Ko ngā akoranga take nui i roto i te rangahau HRO ko ngā akoranga e rua o ngā parekura (hei tauira, Three Mile Island nuclear incident
, te Challenger Disaster me te Columbia Disaster, te leak matū Bhopal, te rererangi rererangi o Tenerife, te ahi ngahere o Mann Gulch, te Black Hawk friendly fire incident i Iraq) me nga HROs penei i te punaha whakahaere waka rererangi, kaipuke rererangi rererangi, me nga mahi mana karihi.