On a dark foggy morning in November 2010, CSX 496 leads an empty coal train north from Florida through Folkston, Georgia.

On a morning like this.. you feel the train before you can see it appear slowly from the shadows. You hear the horn blowing for the crossings and feel the ground shake as the engines pass.

Unit coal trains move tons of "black diamonds" from the fields of the Applachians to the Power Plants which provide energy to millions of customers.