UYUNI, Bolivia: In the rush to build the next generation of hybrid or electric cars, a sobering fact confronts both automakers and governments seeking to lower their reliance on foreign oil: almost half of the world's lithium, the mineral needed to power the vehicles, is found here in Bolivia - a country that may not be willing to surrender it so easily. Japanese and European companies are busily trying to strike deals to tap the resource, but a nationalist sentiment is building quickly in the government of President Evo Morales, an ardent critic of the United States who has already...