[VOA] Lobito, Angola -- In the blistering midday heat at Angola's largest port, U.S. President Joe Biden beamed Wednesday as he shook hands, one by one, with nine smiling hard-hatted workers. He had journeyed all the way from Washington to meet them at the terminus of an ambitious 1,300-kilometer, U.S.-financed rail line that brings critical minerals out of Africa's remote interior.
