<prompt> Ramba uchinyora ndima iyi - Matambudziko okurara akapararira zvikuru uye anogona kuva nemigumisiro yakakomba kuvanhu vanotapurwa pamwe chete nemigumisiro yezvemari nemimwe migumisiro kunzanga. National Transportation Safety Board yeU.S., maererano naDr. Charles Czeisler, nhengo yeInstitute of Medicine uye Mutungamiriri weHarvard University Medical School Division of Sleep Medicine paBrigham neWomens Hospital, akawana kuti chikonzero chikuru 31 chetsaona dzemotokari dzinorema dzinouraya mutyairi chine chokuita nokuneta kunyange zvazvo zvisingawanzobatanidzwi zvakananga nezvinetso zvokurara, zvakadai sokurara usina kufema, nezvinodhaka nedoro sechikonzero chechipiri 29. Kushaya hope kwave kuriwo chimwe chinhu chinokosha chinoita kuti pave netsaona dzinotyisa, dzakadai sokudeuka kwemafuta kweExxon Valdez  <response>: , tsaona dzenyukireya paChernobyl neThree Mile Island uye kuputika kwechikepe chomuchadenga chinonzi Challenger. 