The NO nu A experiment has started taking data with the prototype of the near detector placed in a surface building in October 2010. The far detector of the NO nu A long-baseline experiment is currently under construction and will be located in Ash River, 810 km away from Femilab and 14 mrad off the beam axis. The totally active scintillator detector is designed to identify electron neutrinos that result from the oscillation of beam muon neutrinos. The narrow neutrino beam will be provided by the upgraded NuMI beamline at Fermilab. Among main goals of the NO nu A experiment are precise measurement of the values of the atmospheric neutrino oscillations, determining the value of the theta(13) mixing angle and subsequently the CP violation effect enhanced by the matter effects.