Completed the following sentence: In 2007, there were 104 (69 pressurized water reactors, 35 boiling water reactors) commercial nuclear generating units licensed to operate in the United States, producing approximately 20% of the country's electrical energy needs. In absolute terms, the United States is the world's largest supplier of commercial nuclear power. <unk> <unk> <unk> <unk> <unk> <unk>
Three Mile Island nuclear accident in 1979.<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️