A journey up the 'suicidal' Pilcomayo river that separates Paraguay from Argentina... The Pilcomayo is the life-force of one of Latin America's most arid regions. But it is also one of the most heavily silted rivers of the world. As it courses down from the Bolivian Highlands in the months of December and January, half is water, half sand. This means it often causes flooding. Or, it changes course, failing to deliver water to those who depend on it. So in order to benefit communities, this is a river system that needs careful management, and a lot of human input to ensure the water flows. Compounding the fickleness of the Pilcomayo are 3 years of drought in the region. Gabriela Torres travels north from Asuncion up the course of the Pilcomayo during the dry season, visiting communities where the wildlife is dying and the economy under threat. How will the people - and animals - cope this year?