Original sentence: As such, the label of the "Atomic Age" now connotates either a sense of nostalgia or naïvete, depending on who you ask.In the late 1970s, nuclear power was faced with economic difficulties and widespread public unease, coming to a head in the Three Mile Island accident in 1979, which effectively killed the nuclear power industry for decades to come.The term was initially used in a positive, futuristic sense, but by the 1960s the threats posed by nuclear weapons had begun to edge out nuclear power as the dominant motif of the atom
Edited sentence: By the mid-1960s the dimmer aspects of the Atomic Age had become clear, leading eventually to the massive anti-nuclear demonstrations of the 1970s and '80s