In Pictures: Facts about marijuana and the new laws
Marijuana facts
Credit: Getty Images
Marijuana is the most commonly used illegal drug in the U.S. (the new law makes it legal in Washington). It is made up of dried parts of the Cannabis sativa hemp plant. (Source: National Institute on Drug Abuse)
Other Slideshows
Peek Inside: Baseball legend Stan Musial's $1.8M Ladue home up for sale
Photos: Severe storms slam St. Louis area
Photos: Business district severely damaged in Mt. Olive
Photos: Dozens killed in mile-wide Oklahoma tornado
Photos: Oklahoma tornado damage
Photos: Boeing's 787 Dreamliner resumes flights
