Plan: Fatman

Plan: Fatman is a plan in Fallout 76.

Location

 * Random reward for completing Event: Census Violence, Event: Monster Mash, Daily: Cop a Squatter, Event: Line in the Sand, Event: Distant Thunder, Event: Surface to Air, Event: AWOL Armaments.
 * Low chance of being rewarded for completing Daily: Mistaken Identity, Horde events, Hunter/Hunted PVP, and all Powering Up Quests.

Unlocks
The plan unlocks crafting of the Fat Man at a weapons workbench.