The 197 from DC is a holotape in Fallout 76.
Location[]
The holotape can be found in a wall safe at the Mount Blair Trainyard, in the foreman's office behind some boxes.
Transcript[]
Ed: You got that thing recording, Walter?
Walter: It's on.
Ed: Good. Dan, tell him what you told me.
Dan: Uh, yeah. Sure. So we were unloading the 197 from DC. Huge set of containers. Industrial-sized. Locked up like Fort Knox.
Walter: Uh huh.
Dan: And as soon as it's off the train, this creepy guy in a suit comes out of nowhere, starts questioning me.
Walter: Wait. The 197?
Dan: Yeah. Guy said his name was Grey. Kept asking what I was doing. If I'd seen anything.
Ed: See! I told you, Walter. There's something screwy going on. This is the third shipment this month--
Walter: Look, I don't know what you think you saw, but there is no 197 out of DC. Here. Can look at the manifest yourself.
Ed: But, but that's not true. We saw it. We unloaded the damn thing.
Walter: Boys, there is no 197 from DC. And if you know what's good for you, you'll stop asking questions about it. Now gimme that tape.