The temperature is -17, and the thunderous roar of two 20 cylinder 645's in run 8 fill the frigid Winter air as two of the six remaining Montana Rail Link SD45's on lease to BNSF work West with a 100 car Dilworth, MN to Laurel, MT manifest through a small North Dakota farming community. With a note in BNSF's computer saying "Return to MRL by 4/30" for all of the SD45's, their end may be very near.