On a snowy February 2, 2014, westbound Union Pacific freight MNYRO is climbing the 2% grade between Rocky and Eisele (formerly Clay), Colorado. The head end is about to take down the signal at east Eisele, while the rear DPUs, seen here, are still bunching slack on the big train wrapping around Big 10 Curve. A cold air inversion is visible over Denver and the plains, where thousands of people wait to see the Broncos get slaughtered on this Super Bowl Sunday…