Strange motive power

[nw-mailing-list at nwhs.org]

While on my way back from Roanoke late this afternoon I took 460 and 
happened upon the tail end of a westbound hopper train. I managed to get to 
the head end of it only once and had no luck catching it anywhere to get a 
GOOD glance at the lead locomotive. It was pulled by two locomotives, the 
first unlettered in a grey color, the second was a BNSF unit. I shot a 
hurried picture out the side window of my van around Elliston or 
Shawville... other than that all I ever managed to get a glimpse of were the 
hoppers at a couple crossing including at Montgomery Tunnel.... Any ideas on 
what it may have been? was mid-afternoon, prolly 3-ish, if the time of the 
sighting makes any difference....