Despite its availability for medical use in nearly half of U.S. states, marijuana is considered by the federal government to have no medical purpose.
Because it's also considered to have a high potential for abuse, it's listed as a Schedule I drug — alongside heroin, LSD and ecstasy. Researchers who want to study the drug have dealt with significant bureaucratic issues, reports Liz Reid of WESA.
Liz Reid, reporter for WESA in Pittsburgh. She tweets @WESALiz.
This segment aired on August 30, 2016.