A metal once used primarily as a coloring agent in ceramics is now a sought-after commodity for the U.S. military, which wants to add up to $500 million worth of cobalt to defense stockpiles.

LONDON/TOKYO (Reuters) - Panasonic Corp <6752.T> said it was unable to determine how much of the cobalt used in batteries it makes for Tesla cars comes from Cuba, a country subject to U.S. sanctions, ...