BNSF Railway train Z-CHCDEN9-10 (Priority UPS-LTL Intermodal; Chicago IL - Denver CO) rushes across Camp Creek, just east of Stratton, Nebraska, on August 11th, 2015. Behind the usual BNSF power (8039, 6956, 7283 and 4659) are found General Electric ET44AC demonstrator diesels (GECX 2040, 2042, 2041 and 2043), which are headed to Denver to be tested on coal trains on the Pike's Peak Sub.