Oil hits an all-time low.

April 20th was the worst day for oil prices ever: by the end of the day, you could make a dime by making a purchase. POLITICO’s Ben Lefebvre explains how such a thing could happen. Plus, the Supreme Court rules to keep the Superfund program alive. Kelsey Tamborrino is a Politico Energy reporter.Irene Noguchi is the executive producer of Politico's audio department.Jenny Ament is the senior producer of Politico's audio department.Carlos Prieto is a Politico podcast producer.