Nuclear energy is about to play a huge role in powering America, but the new reactors that will do the heavy lifting are surprisingly small. Some are so small they are classified as microreactors—mobile powerhouses capable of being transported anywhere they’re needed to provide power, including the most remote sites on the planet. Spotlight on America traveled to the Idaho National Laboratory (INL), where these microreactors are about to be powered up and tested for the very first time inside a facility already famous for making history. Now, history is unfolding here once again. The newly renovated and reconfigured Dome...