found an interesting snippet today while watching the documentary "America's Book of Secrets" on Netflix (Season 1, Episode 3)
specifically, that when gold was transported in and out of Ft. Knox by rail (when the destination was West Point or NYC) the Standard RR was used.. in this case... a Heavyweight REA
I caught the interesting fact with 3:51 remaining
kinda gives an interesting spin on potential Op's and special loads