When I meet [Edward] Moses [at the Lawrence Livermore National Laboratory], the 60-year-old scientist ... shows me a tiny pellet ... and swears it will provide an endless supply of safe, clean energy. The pellet Moses holds is a model, but the real version will contain a few milligrams of deuterium and tritium, isotopes of hydrogen that can be extracted from water. If you blast the pellet with a powerful laser, you can create a reaction like the one that takes place at the center of the sun. Harness that reaction, and you've created a star on earth, and with the heat from that star you can generate electricity without creating any pollution. Forget about nuke plants, coal, oil, or wind and solar. This is the real solar power," says Moses. What Moses is talking about is controlled nuclear fusion. Instead of splitting the nucleus of an atom, you're trying to force a deuterium nucleus to merge, or fuse, with a tritium nucleus. When that happens, you produce helium and throw off energy. Scientists have been trying to produce energy with fusion for decades. So far, they keep failing. The joke is that fusion energy is only 40 years away, and will always be only 40 years away. Moses believes, however, that his lab, which is called the National Ignition Facility, or NIF, has cracked the problem. The big challenge fusion has faced is lack of power. NIF's laser ... can produce 60 times more energy than any other laser ever built. Right now it's still being tested. But next year Moses and his scientists will fire it up with a full load of deuterium-tritium fuel, and Moses feels confident it will achieve "ignition," meaning a controlled burn in which you get out more energy than you put in.