Stockpiles of iron ore sit at the ship loading facility at Fortescue Metals Group Ltd.'s Herb Elliott Port in Port Hedland in the Pilbara region, Western Australia, on Tuesday, Dec. 3, 2013. Fortescue, Australia's biggest issuer of junk-rated mining bonds, is targeting investment-grade status as strength in iron ore prices lets the company cut its debt burden. Photographer: Sergio Dionisio/Bloomberg via Getty Images
