Two Axles Derail on ‘Big Boy’ in Slow-speed Mishap in RawlinsTwo Axles Derail on ‘Big Boy’ in Slow-speed Mishap in RawlinsThe world’s largest operating steam locomotive, 600-ton Union Pacific Big Boy No. 4014, derailed Thursday afternoon as it entered the yard in RawlinsThomas KocalThomas Kocal
