LA Times: To paraphrase Oscar Wilde: One deadly explosion while extracting fossil fuels may be regarded as a misfortune, but two within a month looks like carelessness. That’s the problem lawmakers are wrestling with amid hearings and federal investigations of the Upper Big Branch mine blast in West Virginia and the BP oil rig collapse in the Gulf of Mexico. We’re pleased to see that the reactive machinery is functioning, and confident that it will result in regulations to better protect miners and …