Recently, two deadly mass shootings within 24-hours, one in El Paso, Texas, and one in Dayton, Ohio reignited the polarizing and seemingly never-ending debate about gun control. One of the arguments pro-gun people use to defend their right to carry around guns is that "it takes a good guy with a gun to stop a bad guy with a gun." But how is the general public supposed to know the difference between a "bad guy" and a "good guy"? And how often do we read stories of mass shooters actually being stopped by a "good guy" with a gun?