UPDATE 1-CSX's Hunter Harrison bashes U.S. trade groups over rail complaints
August 17, 2017 at 12:03 PM EDT
Aug 17 (Reuters) - CSX Corp Chief Executive Hunter Harrison hit back at dozens of trade groups that urged a federal probe of service disruptions at the No. 3 U.S. railroad, saying their complaints were "grossly exaggerated," according to a letter seen by Reuters on Thursday.