In 1969, the U.S. was flipping the switch on three new nuclear reactors a year—fast, efficient, and powering millions of homes. Then, almost overnight, the industry collapsed, not because of accidents like Three Mile Island, but because of a single rule that changed everything. This video uncovers the little-known story of how fear, regulation, and economics killed America’s nuclear momentum. And why small modular reactors might finally bring it back.