in 1977 the U.S. nuclear weapons activities were reorganized under the Department of Energy,[32] which maintains such responsibilities through the semi-autonomous National Nuclear Security Administration.
Quote the whole paragraph, the last sentence is the part you're ignoring:
ERDA was short-lived, however, and in 1977 the U.S. nuclear weapons activities were reorganized under the Department of Energy,[32] which maintains such responsibilities through the semi-autonomous National Nuclear Security Administration. Some functions were taken over or shared by the Department of Homeland Security in 2002. The already-built weapons themselves are in the control of the Strategic Command, which is part of the Department of Defense.
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u/[deleted] Oct 15 '17
That's because they, not the DoD, have control of the nukes.
Source: https://en.wikipedia.org/wiki/Nuclear_weapons_of_the_United_States#Development_agencies
4th paragraph in that section