FILE PHOTO: A row of excavators are seen at the Caterpillar booth at the CONEXPO-CON/AGG convention at the Las Vegas Convention Center in Las Vegas, Nevada, U.S. March 9, 2017. REUTERS/David Becker/File Photo
FILE PHOTO: A row of excavators are seen at the Caterpillar booth at the CONEXPO-CON/AGG convention at the Las Vegas Convention Center in Las Vegas, Nevada, U.S. March 9, 2017. REUTERS/David Becker/File Photo