Abstract: The discovery of neutrino oscillations opened new windows for the study of neutrino physics. In this talk, I will present the history and importance of neutrino physics, concentrating on neutrinos produced by accelerator. Specifically, I will give an overview of the neutrino physics program at Fermilab and the remaining questions for the neutrino physics. In order to answer the open questions in neutrino physics, it is critical that we understand neutrino interactions and nuclear effects on these interactions extremely well. MINERvA is a neutrino scattering experiment which make precision measurements of cross sections and a studies of nuclear effects. I will present measurements of quasi-elastic scattering, which is one of the largest contributions to the signal of many oscillation experiments.