"The Department of Energy (DOE) is a cabinet-level agency that has both important energy- and national security-related missions. DOE’s roots go all the way back to World War II and the Manhattan Project, the top-secret program that launched America’s effort to develop and stockpile nuclear weapons. DOE’s predecessor, the Atomic Energy Commission, managed the country’s nuclear weapons complex until the 1970s, when the Energy Department assumed that responsibility upon its creation. Today, Energy officials still oversee the laboratories that were once primarily responsible for creating weapons of mass destruction, along with implementing policies geared toward strengthening the United States’ sources of energy. The DOE carries out policies ranging from nuclear power to fossil fuels to alternative energy sources. Under the current administration of President Barack Obama, U.S. energy policy has focused primarily on “clean energy” initiatives and technologies, a departure from the policies of former President George W. Bush, whose DOE provided considerable support to nuclear power and oil development, which provoked criticism from environmentalists and those on the left."
AllGov - Departments
"But the primary function of the Department of Energy has nothing to do with green energy technologies. It’s one that, as Perry would have known if he’d fully understood it years ago, makes the DOE all but indispensable:
maintaining America’s nuclear weapons stockpile.That’s where the vast majority of its money goes. During the Cold War as the United States entered its arms race against the Soviet Union, the DOE’s primary function was weapons research. It was the organization responsible for finding new technologies to get a leg up on the Russians. Its lineage can be traced back to the
Manhattan Project and the creation of the very first nuclear bomb."
https://www.inverse.com/article/25403-what-does-the-department-of-energy
Rick Perry doesn't know any of that, and all you are doing in this thread is defending him.