By Gabriel Stargardter and Daniela Desantis
Early one morning in July of last year, about 30 Paraguayan anti-narcotics officers flew into a vast wooded wilderness known as the Chaco to raid five airplane landing strips used by drug traffickers.
Situated in northern Paraguay, a small, landlocked South American nation, the isolated Chaco has in recent years become a key trans-shipment point for gangs trafficking Andean cocaine to booming European markets.