Pacing blur Passing at a combined speed of over 120 mph, a westbound Union Pacific stack train meets an eastbound vehicle train near Dunlap, Iowa, on May 22, 2014, in a view along good old U.S. 30.
Pace and pan shots of trains from on the ground or in the air. If you're not in the locomotive cab or on-board the train, it's the next best thing to being there.
