The Nuclear Spectroscopic Telescope Array (NuSTAR) Small Explorer Mission will be the first focusing X-ray telescope to image the sky at X-ray energies above 10 keV. NuSTAR will undertake a program of Galactic and extagalactic surveys with a combination of sensitivity and resolution more than an order of magnitude improved over previous high energy X-ray missions. In this talk I will describe the science program enabled by this new capability.