January 22 marked the first anniversary of actor Heath Ledger's death in New York City from an overdose of multiple prescription drugs.  

According to the World Health Organization, at least 15 million people across the globe suffer from drug use disorders.  Experts say in the U.S., the number of unintentional deaths from prescription drug overdose has risen significantly. A recent study  looks at the problem in one state.

Click on the video link to see the full report.