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

When one thinks of the U.S. Navy, ships, submarines, and fast fighter jets probably quickly spring to mind. Armored railcars probably not so much. Those sound more like the stuff of spaghetti westerns, WWII history books, and Steven Seagal movies. But after our investigation, spurred by rail spotters not being able to make sense of a mysterious blue-painted armored caboose, we learned that this year, the Navy, in cooperation with the Department of Energy, is set to begin using a new "fleet" of heavily armored cabooses specially outfitted to escort trainloads of sensitive nuclear material.