Craig Dukes has been appointed head of the Mu2e Cosmic Ray Veto system (Level 2 manager in DOE parlance). Cosmic ray muons can produce background electrons that mimic muon-to-electron conversions. Hence all such search experiments have a cosmic ray shield, consisting of passive absorbers (iron, concrete, and dirt) and active detectors. The Cosmic Ray Veto much identify and veto 99.99% of cosmic-ray muons that produce conversion-like electrons. With an area the size of a large house, this is a challenging task.