  The Double Chooz Reactor Neutrino Experiment in France plans to quickly
measure the neutrino mixing angle theta-13, or limit it to sin^2 2-theta_13
less than 0.025. The physics reach, experimental site, detector structures,
scintillator, photodetection, electronics, calibration and simulations are
described. The possibility of using Double Chooz to explore the possible use of
a antineutrino detector for non-proliferation goals is also presented.
