On one side are multimillion-dollar mansions with swimming pools. On the other are crowded slums where residents have had to build up the hillside. More from News After a four-year legal battle ...

He worked closely with fixer and taxi driver Alan Lima, who has many contacts in slums. Dana and Fisch, senior video producer, did the same with police forces, eventually persuading an investigative ...

We meet Abel Cruz, the Peruvian man behind a huge fog net project which is providing water to a community in the slums of Lima. Could fog catching be a solution to wider water crises facing the world?