San Francisco, the epicenter of The 60s Psychedelic Revolution-- is notorious for drugs. But in the new millennium, the city, especially the gay community, is struggling to recover from a meth epidemic. The enabler of this situation is the Asian Cartel, who has been poisoning San Francisco with high quality meth for almost 25 years-- but the Mexican Cartels are intent on taking over. Nat Geo goes inside one of the worst drug ghettos in America--the heart of the drug trade.

Kingston is in the hands of highly organized and warring drug gangs. They manage drug trafficking and distribution at all levels. With the patronage of politicians, they fight hard to protect their turf in a city where poverty and guns drive the drug trade. Written by Anonymous

Chicago, the biggest open-air crack and heroin market in America is at saturation point. The result: record levels of overdoses and homicides, as gangs fight over drug turf.

Houston's drug hub is the 'Bloody Nickel' - the Fifth Ward. Five square miles of 24/7 drug and party action. Gangs work across the ethnic divide to keep the drugs flowing; while cops and Cartels vie with each other for control.

Denver - the mile high city - has just legalized recreational use of Marijuana. The city's gang-banger dealers have battled falling profits since medical Marijuana became law, and forced them to push new products. This latest move is last straw. Written by Anonymous

Miami - once America's cocaine capital; but no more. The War on Drugs has hit home. Today dealers and users play cat and mouse with the cops and live in dread of the Feds. And a new look drug scene has gone underground.

Music and drugs go hand in hand in Nashville. For musicians who don't make it, drugs are the easiest way to make a living. National Geographic talks to a user and freelance cook who makes methamphetamine at home to cover his costs and get high. Then, learn how the 19th Judicial District Drug Task Force is faced with cleaning up after meth cooks' Â- operations that are both extremely dangerous and prohibitively expensive. Written by Anonymous