The latest news on marijuana
Marijuana dispensaries still face obstacles after Obama administration announcement.
The prominent Republican makes an appeal for drug policy reform.
Roughly 7 percent of Americans are regular pot smokers.
After lengthy delay, Justice Department gives states go-ahead for legalization plans.
The attorney general will allow state laws legalizing use of the drug to stand.
Congress invites Eric Holder to outline federal approach to marijuana enforcement.
Pot advocates fear without armored cars armed robbers will strike.
Christie denies flip-flopping on gun ban measure.
Colorado congressman says Holder needs to clarify federal policy.
Calling out a lack of medical marijuana research, Sanjay Gupta has brought pot to the forefront.