What does the U.S. Government do with its massive supercomputers? One use is to plan visionary ways of protecting the planet from extraterrestrial threats. No not UFOs, meteors. To realistically consider such mind-bogglingly ambitious concepts, the scientists and engineers turn to computer simulations backed by years of careful comparisons with tests. They perform these simulations using technology known as Computational Fluid Dynamics (CFD) on massive supercomputers a technology field known as High Performance Computing (HPC). Then visualization tools such as EnSight perform post-processing after the simulation is complete to reduce the data to manageable size and visualize the data and animate it so that complex data becomes understandable to the engineers and scientists. We call this HPC CFD Post-processing, and its EnSight’s forte.