Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 | Department of Energy Timeline of Events: 1971 to 1980 Timeline of Events: 1971 to 1980