With a brown cloud hovering overhead and a second-place football team, Denver had dreams of becoming a world-class city. But it wasn't until the turn of the millennium that it found a way to get there: trains. Part 1 of 4. Hosted and reported by Nathaniel Minor Editors: Erin Jones, Joe Wertz Production and mixing: Rebekah Romberg Additional production: Luis Antonio Perez Theme song by Daniel Mescher. Additional music via Universal Production Music. Artwork: Mia Rincón Executive producers: Kevin Dale, Brad Turner  Additional editorial support: Jo Erickson, Alison Borden, Rachel Estabrook, Ana Campbell, Sherkiya Wedgeworth-Hollowell, Andrew Villegas, Dave Burdick  Archival tape thanks: Heather Dalton and Dominic Dezzutti at CPT-12; Tim Wieland and Steve Vriesman at CBS4 Denver; Kevin Krug at KMGH Denver7. Thanks also to Kim Nguyen, Jodi Gersh, Clara Shelton, Hart Van Denburg. Ghost Train is a production of CPR News and Colorado Public Radio's Audio Innovations Studio. www.cpr.org/podcast/ghost-train On Twitter: @COPublicRadio @nbminor Correction: An earlier version of this episode incorrectly said Seattle had built a light rail system in the 1990s. The reference has been removed.