Tin mining in Bolivia. Workers loaded on a train as it enters a tin mine. An electric train loaded with ore of tin moves out of the mine.
Tin mining in Bolivia. Men wearing helmets with lights work on a hose. A miner sprays water with the hose. Miners with helmets operate a drilling machine as they drill into the roof of the mine.
Tin mining in Bolivia. A view of the road between the hills. Houses and a tin mine in a valley. Mountains in the background. An American Army pickup truck moves through muddy water and rough road. Men loaded onto the truck. The truck moves down a narrow road and crosses a civilian truck.
Construction of roads in Bolivia. A worker uses a pick axe to construct a culvert. Two men shape large stone blocks with hammers. A man talks to them. A worker reads a propaganda comic booklet. A Caterpillar bulldozer levels the earth. A man operates the Caterpillar bulldozer.
Construction of roads in Bolivia. A stream at the bottom of a valley. Workers construct a road supporting a wall on the side of a steep cliff. Men work with pick axes on the side of the cliff. A man smokes a cigar as he supervises the work. A sign in Spanish about the road construction project and a map of the road at the bottom.
Construction of a road in Bolivia. Water puddled up in the foreground as a truck moves across it. Buildings in the background. American and Bolivian officers talk at the construction site near a cliff. Two donkeys and a native walk in front of a truck on a winding road. The course of a dried up stream at the bottom of a valley.