K9s for Warriors: Shelter dogs helping veterans with PTSD

Post Traumatic Stress Disorder affects millions of Americans.

While it's very difficult to treat, one woman's IDEA for a treatment may not be intuitive, but it is becoming increasingly popular.
It doesn't require any drugs, has no side effects, and boasts a success rate of 97 percent.
Skeptical? So were some of the people it's now helping.

Erin Burnett reports.