BNSF Railway AC4400CW 5643 leads Metrolink train 811 (Riverside to Laguna Niguel/Mission Viejo) as the train makes a stop in Orange, Cailfornia, on April 1st, 2016. Metrolink has leased a number of these BNSF engines to lead trains in "push mode" because they don't have 100% confidence in their recently-built Hyundai Rotem cab cars. (Full disclosure - This was taken by my wife, Debra!)