McDonald's CEO Chris Kempczinski apologized to customers on Tuesday after an outbreak of E. coli that has sickened dozens and left one dead was linked to its Quarter Pounder hamburgers. "On behalf of the entire system, we are sorry for what our customers have experienced," Kempczinski said during the company's earnings call. "We offer our sincere and deepest sympathies, and we are committed to making this right." "Hearing reports of how this has impacted our customers has been wrenching for us," Kempczinski ...