It should be a duty of PBS to visit Bolivia again; proving or disproving if Evo Morales did change anything about the problem his supporters had. Four years have passed since Evo Morales become president; enough time to move the economic chain towards the population that needed help. As far as I know there are only sixty thousand coca farmers in the region where illegal coca is planted. Bolivia has a population of ten million; something is obviously not well explained. A coca farmer earns more money planting coca leafs than with other natural products. Where is going all the money coca farmers earn? PBS should do a better job on this subject.