How oil led Venezuela to chaos

DISASTER: How has the country with the largest confirmed oil reserves in the world collapsed into economic ruin?
Demonstrators use shields decorated with religious motifs and the colors of Venezuela's national flag prior clashing with government forces on a highway during a march against the government of President Nicolas Maduro in Caracas, Venezuela, Wednesday, May 31, 2017. Protests have left dozens dead in the last two months as the opposition demands immediate presidential elections and the liberation of political prisoners. (AP Photo/Ariana Cubillos)