PODGORICA (Reuters) - Perched atop massive cement pillars that tower above Montenegro’s picturesque Moraca river canyon, scores of Chinese workers are building a state-of-the-art highway through some of the roughest terrain in southern Europe. The government has described the 165 km (103 mile) highway, with its imposing bridges and deep-cut tunnels, as the construction of the century and a pathway to the modern world. It is designed to link the port of Bar on Montenegro’s Adriatic coast to landlocked neighbor Serbia. But once the first, challenging 41 km stretch through mountains north of the capital is completed, the government faces...