In 2019, No. 4014 ran under its own power for the first time in over 59 years, becoming the largest operational steam locomotive in the world.
https://en.wikipedia.org/wiki/Union_Pacific_4014
> In 2019, No. 4014 ran under its own power for the first time in over 59 years, becoming the largest operational steam locomotive in the world.
https://en.wikipedia.org/wiki/Union_Pacific_4014