<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-1979, uDaniel Sheehan, uSara Nelson kanye nabaningi babangane nabakhi becala likaSilkwood bahlangana eWashington, D.C. ukuze basungule iChristic Institute. Eminyakeni engu-12 eyalandela, njengomeluleki Jikelele weSikhungo, uSheehan wasiza ekushushiseni amanye amacala adume kakhulu entshisakalo yomphakathi ngaleso sikhathi. UChristic wamelela izisulu zenhlekelele yenuzi eThree Mile Island  <response>: . futhi. 