How close are we to using nuclear fusion as an energy source?

CNN-  The feat was achieved at the National Ignition Facility at Lawrence Livermore National Laboratory in California. Mind you, this wasn’t the first time that researchers have observed fusion in a laboratory, but it was the first time using this technique that the process surpassed “break even,” which means that the fusing elements released more energy than the lasers supplied.This is a monumental step for science and a spectacular technical achievement. Since scientists first observed nuclear fusion back in the 1930s, it has been known that it could provide essentially limitless energy. And, especially relevant in this day and age of concerns about global warming and climate change, it is a carbon-free technology.