In this photo provided by Grand Canyon Railway courtesy of Geoff Gourley, Grand Canyon Railway conductor Bruce Baker, left, welcomes passengers aboard the Polar Express train at the Grand Canyon Railway depot in Williams, Ariz. The railway will be able to expand operations from two to three trains a day under a plan approved by the National Park Service. An environmental assessment for train operations approved this week also will allow up to 30 special trains each year for events and promotions.