UNLV Two-stage Light Gas Gun Experimental Measurements Physical Results of Impact on Target Plates Research Objectives Computational Analysis Methods Material Models used in Computational Analysis Simulation Comparison: Crater and Deformation Simulation Comparison: Free Surface Velocity High Speed Video of Experiments Microscopy of Failure Surface: Is Phase Change an Issue? Electron Back Scatter Diffraction (EBSD) of Failure Surfaces On-going Plans and Future Wor