Steam from TMI Unit 1’s cooling tower is seen in this York, Pa., Daily Record/Sunday News file photo. That scene has remained unchanged since the partial meltdown of Unit 2’s reactor in 1979. In 40 years, those cooling towers, worldwide symbols of nuclear energy and its downside will be no more. TMI Unit 2 is slated to be dismantled and demolished alongside TMI Unit 1 starting in 2044, according to a YDR story. TMI Unit 1’s operating license extends to 2034. So what are now internationally known symbols will pass into history within the lifetimes of many York countians.