A Caterpillar Inc. mining truck leaves for the processing plant after collecting newly-excavated ore from the open pit at Katanga Mining Ltd.'s KOV copper and cobalt mine in Kolwezi, Katanga province, Democratic Republic of Congo, on Wednesday, Aug. 1, 2012. Israeli billionaire Dan Gertler, whose grandfather co-founded Israel's diamond exchange in 1947, arrived in Congo in 1997 seeking rough diamonds. Since those early days, Gertler has invested in iron ore, gold, cobalt and copper as well as agriculture, oil and banking.