FILE PHOTO: Spare train wheels are stored at a Burlington Northern Santa Fe (BNSF) railyard in Seattle, Washington, U.S., February 10, 2017. REUTERS/Chris Helgren/File Photo
FILE PHOTO: Spare train wheels are stored at a Burlington Northern Santa Fe (BNSF) railyard in Seattle, Washington, U.S., February 10, 2017. REUTERS/Chris Helgren/File Photo