It's no great surprise that the oil and gas industry is dangerous—but just how dangerous? And how bad does it have to get before regulators and elected officials step in and do something? Those questions were the jumping-off point for this four-part radio series (and multi-part web series) about oil and gas worker deaths. Using original data analysis, we compared the oil and gas industry in different states and with other dangerous industries. We then examined ways to make a dangerous industry safer.