Reporter Guillermo Galdos joins customs agents in Galicia tracking the gangs who use home-made submarines to smuggle vast quantities of cocaine into Spain and across Europe.

In Brazil, land is power. Reporter Symeon Brown meets Brazil's communist activists taking the land from the rich to give to the poor. But challenging wealthy landowners can be deadly.

In Karachi, young female rappers are juggling traditional values and interference from conservative forces as they launch a fresh urban sound.

The war on drugs has put thousands of Mexicans behind bars without trial. From police night patrols to high-security jails, a look at the suspects stuck in legal limbo.

Beyond the bright lights of Las Vegas there's a homelessness crisis going on, as thousands of the city's residents seek refuge in risky, drug-riddled underground tunnels.