PODGORICA (Reuters) - Perched atop massive cement pillars that tower above Montenegros 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.