"Well," Ellen says, "the place was completely full of Enclave soldiers and fortifications. We dealt with that, that wasn't- wasn't the problem. We... I talked their commander into pulling out, him and his guards."

She's still remembering the look on Autumn's face. The Enclave is at the very height of its power...

"They- they'd been trying to- they'd tried to activate the purifier. Something they did, something Dad did, I don't know... but something had set off this climb in radiation levels inside. If it didn't get activated and start venting, it would've exploded. And then it'd just blow the rads all over the area."