jeff flock joining us live from a coal yard in romeoville illinois.on beautiful evening, jeff. what is caution the shortage of coal? >> well the problem is you got to get it from where it is to where they need it like a power plant right here behind me outside of chicago. this is the nrg plant. you see a pile of coal. i tell you that pile needs to be a lot big. look at stockpiles over the cores of the last couple years. i broke this out last five years. if you look up close an personal the last several quarters, stockpiles have been cut in half from what they were at very low level because there is a problem with getting coal where it needs to get. we talked to the eia, that told us as plants rebuild their stockpiles from last year's freezing cold polar vortex winter, many operators are trying to get shipments of coal well above the levels they received last year. issues with delivery by rail make it difficult. why is it difficult by rail? we have a boom in the oil fields as well as a huge grain harvest. 2/3 of the coal used in the electricity in the