Fallout 3/The Power of the Atom

Note: You need an explosives skill of at least 25 to complete this quest.

When you first reach Megaton, Lucas gives a quick introduction about the town and why it's called such; there is a live atomic bomb in the crater. Since it is a threat, he asks if you think you can disarm it.

A competing interest is located in Moriarty's Tavern - Mr. Burke wants to blow up Megaton by rigging the bomb to explode, and gives you a device that allows you to detonate the bomb.

Optional tasks:
 * You can report Mr. Burke to Lucas Simms.