The opioid crisis in the U.S. has the potential to become a national security threat beyond anything America has experienced from a foreign power.
For Americans under the age of 50, a drug overdoses is now the leading cause of death - and we can blame heroin, fentanyl and other opioid drugs.
Many illicit drug users who thought they were taking heroin this summer were actually taking a substance that has been viewed as a chemical weapon.
More than 200 people overdosed in the Midwest and Northeast in just one week on heroin tainted with substances like carfentanil. What is the source?