why they attacked this fire, why they had to wait in certain cases. that's coming up. answers to that at 6:00 tonight. until then, thanks for watching us at 5:00. good night. >> couric: tonight, scenes from a nightmare. an entire neighborhood near san francisco explodes in flames after a natural gas pipeline breaks. now rescue teams search the rubble for victims. i'm katie couric in los angeles. also tonight, it just keeps getting stranger. that pastor threatening to burn korans makes an ultimatum and now his daughter says she fears he's gone mad. changing the way cancer cells behave. a revolution in the fight against this deadly disease. and you can make a difference in the battle. join us tonight as we stand up to cancer. captioning sponsored by cbs this is the "cbs evening news"