<prompt> Qedela umusho olandelayo: Izifundo ezibalulekile zocwaningo lwe-HRO zifaka kokubili izifundo zezinhlekelele isib.,  <response>: I-Three Mile Island nuclear incident, i-Challenger Disaster kanye ne-Columbia Disaster, ukuvuza kwamakhemikhali eBhopal, ukuphahlazeka kwendiza eTenerife, umlilo wehlathi iMann Gulch, isigameko somlilo wobungani weBlack Hawk e-Iraq kanye nama-HRO afana nohlelo lokulawula ukuhamba kwezindiza, abathwali bezindiza zasolwandle, kanye nokusebenza kwamandla enuzi. 