ITER (The Way in Latin) is the fusion prototype reactor in construction in southern France.
It is an international project where 35 nations are collaborating to build the world's latest Tokamak.
ITER will maintain fusion for long periods of time and will be the first fusion device to produce net energy, but not electricity. It will test the technologies, materials, and physics regimes necessary for the commercial production of fusion-based electricity.
ITER was set in motion in 1985 and the building construction started in 2010. First fusion reactions were planned for 2035, but now may well be delayed.ITER Website