Duck and Cover!

Duck and Cover! is an aid item in Fallout 3 and Fallout: New Vegas.

Background
A pre-War book containing information about the manufacture, use, and disarming of explosives.

Gameplay
Using the item adds one point to explosives in Fallout 3 (two with the Comprehension perk, or three points to explosives in Fallout: New Vegas (four with the Comprehension perk).

Behind the scenes
Duck and Cover is a 1952 real world civil defense educational film.