Chief executives of four of the world’s biggest mining and mining equipment companies will discuss “The global supply chain for coal and minerals, where we have been and where we are going,”  on September 24 at MINExpo International 2012, the National Mining Association’s (NMA) quadrennial mining exhibition at the Las Vegas Convention Center. The Opening Session, which is a new feature for MINExpo, will feature CEOs Richard Adkerson of Freeport-McMoRan Copper and Gold, Gregory Boyce of Peabody Energy, Richard O’Brien of Newmont Mining Corporation and Michael Sutherlin of Joy Global.  Sutherlin is also Chair of MINExpo 2012. Author and international trade expert Jeffrey Garten of the Yale University School of Management will moderate the panel discussion beginning at 10.00 in Room S223. “We’re very fortunate to begin the biggest mining show in history with such a powerful line up to survey this truly global industry, which is essential to the global economy,” said NMA President and CEO Hal Quinn.