![Prepared marijuana is for sale for those who possess a medical marijuana card, inside a dispensary in the small Rocky Mountain town of Nederland, Colo.](https://will.illinois.edu/images/uploads/30063/ap88376812072__medium.jpg)
![Marijuana used for medicinal purposes.](https://will.illinois.edu/images/uploads/23779/blackberry_medical_cannabis__medium.jpg)
Researching Medical Marijuana A Challenge For Scientists
The science behind medical marijuana is hazy, in part because it's difficult for scientists to gain access to the drug for research.
![Damage from a tornado that struck Gifford, Ill. on Sunday, Nov. 18, 2013.](https://will.illinois.edu/images/uploads/25703/giffordstorm7__medium.jpg)
2013 by the Headlines
This hour on Focus, we’ll take a look back at 2013 by the headlines.