As the opioid crisis continues to worsen, drug overdoses are now the leading cause of death for Americans under the age of 50. The widespread abuse of prescription painkillers led to the surge in opioid abuse, and those prescribed pills were distributed by some of the country's largest corporations. The Center for Investigative Reporting has this podcast on how it happened and why drug distributors ignored warnings of widespread abuse. There's also a transcript of the podcast available.