Tunneling through the Andes to speed global trade

SANDALS Resorts (300 x 250)

In this computer generated image released by Bi-Oceanico Corridor, a miniature model of a train for the proposed Aconcagua Bi-Oceanico Corridor is seen on a bridge in the Andes mountains. Two of South America's leading economies are neighbors but might as well be worlds apart, separated by a mountain wall with only one major land crossing that gets snowed in for up to two months every winter. An ambitious effort to build a private railway under Andean peaks aims to end the bottleneck. (AP Photo/Bi-Oceanico Corridor)South American engineers are trying to tackle one of the continent's greatest natural challenges: the towering Andes mountain chain that creates a costly physical barrier for nations ever-more-dependent on trade with Asia.