Amtrak Meets Solo-MAC-led BNSF Train with Executive MAC DPU

The eastbound "California Zephyr" passes Agency, Iowa on August 22, 2018. Just before Amtrak #6 disappears from sight, it meets a westbound BNSF unit freight train. This second train, which is probably a sand train, has a single MAC with a blank nose on its front. Two locomotives are on the end as distributed power units. The first one is in the executive green and cream of the Burlington Northern. "California Zephyr" consist: Amtrak 73 GE P42DC Amtrak 60 GE P42DC 61012 baggage car 32005 sleeping car 32055 sleeping car 32093 sleeping car 32048 sleeping car 38044 dining car 33047 sightseer lounge 31033 baggage-coach 34099 coach 34001 coach Freight train engines: BNSF 9923 EMD SD70MAC BNSF 9732 EMD SD70MAC BNSF 6878 GE ES44C4