Arlington, VA, 2015-6-11 — /EPR Retail News/ — The National Grocers Association (NGA) congratulated 41 grocery executives on their completion of the 2015 Executive Leadership Development Program (ELDP). The 2015 ELDP course was held May 31 - June 4, at Cornell University, located in Ithaca, New York. "As the new generation of grocery executives take on leadership roles…