The article has some major errors which makes me wonder about the author. For example the following sentence:
"U.S. submarines and aircraft carriers run on nuclear power, but they have large fusion reactors on board that have to be replaced on a regular cycle."
Submarines and aircraft carriers do not have a fusion reactor. The author seems to be confusing the very different fusion and fission nuclear processes. Also reactors are not replaced on a regular cycle. Possibly the author meant they need to be fuelled on a regular cycle.
If you want to see what is involved in building a real fusion reactor see
http://en.wikipedia.org/wiki/ITER and
www.iter.org. This is an international 10-20 billion dollar project to build a working fusion reactor. It is an international effort similar in size to that for the International Space Station and the Large Hadron Collider.