Megaton

Megaton is a fortified settlement in the Capital Wasteland. It is built in and around a crater with an undetonated megaton class atomic bomb at its center, after which the town is named. The town of Megaton is protected by large metal walls made from various scavenged materials, primarily the scraps of old pre-War airplanes, which were assembled and reforged together several decades ago by the founders of Megaton in an effort to make the town safer. With 28 named inhabitants, 10 unnamed Megaton settlers, and 4 Children of the Atom, it is rivaled only by Rivet City in population.

In When the Cold Breeze Blows Away, it would be happened in post-Last Day when 4 Children of the Atom defended it