Under the Federal Law, Cannabis is still illegal in the USA; however, some states have created the exception for medical cannabis use and decriminalization of the non-medical cannabis usage. Every day more and more politicians, famous and rich people are getting involved in this marijuana war. So far the result has been positive. 20 States of the US and the District Of Columbia legalized cannabis at some degree, and there are 14 more states are on their way. For those, who doesn't keep up with politicians, bills and ballots, here is an updated Medical Cannabis Map 2013 by the State.