Many consider medical marijuana to be one of the most contentious debates in health care today. Twenty states and Washington, D.C. have legalized the use of marijuana to help alleviate side effects from a number of diseases and medications. But federal law still defines it as having no medical value and being as addictive as heroin. The Medical Marijuana Program in the nation's capital took 12 years to legalize and more than three years to implement. But though it's now up and running, VOA's Tala Hadavi tells us only a small number of people have signed on.