Israeli billionaire Dan Gertler talks on his smartphone while walking past mining rubble during a visit to Comide SPRL's Mashitu copper mine, operated by Eurasian Natural Resources Corp. (ENRC), in Katanga province, Democratic Republic of Congo, on Wednesday, Aug. 1, 2012. Since he first arrived in wartime Congo in 1997 at only 23 years old, Gertler has amassed an empire worth almost $2.5 billion dollars, according to Bloomberg calculations using publicly available documents. Photographer: Simon Dawson/Bloomberg via Getty Images
