Because the thought of getting behind the controls of this one point two million pound machine is enough to make the founder blogger drool and that thought spending five year restoring in enough to make me pine for Cheyenne, Wyoming, from George Lauby, North Platte Bulletin:
Big Boy Northern Pacific 4014

The historic Big Boy No. 4014 — said to be the biggest steam locomotive in the world — took another step toward Cheyenne, Wyo. Sunday, when it entered the national rail network for the first time in 52 years.

Hat tips to RailGiants Train Museum for taking such good care of Big Boy for over fifty years and to Union Pacific for turning back the pages of the calender.