The New Blue Caboose.

[bikeman]

Wait, This Mysterious Heavily-Armored Blue Train Caboose Belongs To The Navy?

The Navy is a prolific user of nuclear power and needs to protect nuclear material when traveling by rail. That's where the armored caboose comes in.

www.thedrive.com

tl;dr article about new Navy armored cabooses.

 

[Ferroequinologist]

Considering the last cabooses rolled off the assembly lines in the mid 70s, I'm not surprised they are building new ones since the originals are wearing out. Plus there is s lot more room in that on!