Union Pacific's executive team will undergo changes as CEO and President Jim Young will be on a medical leave of absence while he is treated for pancreatic cancer. The company has named Jack Koraleski as the railroad's acting CEO and president. Young will still serve as board chairman during his absence from the company. "We are confident that our company will continue to provide great service to our customers while meeting the financial and safety objectives we have set for ourselves and our shareholders expect," said Steven Rogel, a board member.
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