Mother Jones recently posted a decalogue on gun myths: 10 Pro-Gun Myths, Shot Down.
Although the title is self-explanatory, it is worth citing the intro:
"By cutting off federal funding for research and stymieing data collection and sharing, the National Rifle Association has tried to do to the study of gun violence what climate deniers have done to the science of global warming. No wonder: When it comes to hard numbers, some of the gun lobby’s favorite arguments are full of holes."
It is worth looking at those, not just because of the endless sequence of shooting deaths, but also because the self-aggrandizing fantasy about the mythical "good guy with a gun" unfortunately claimed another victim: When Carrying A Concealed Weapon Gets You Killed.
And I quote: "The Las Vegas shootings carried out by Amanda and Jerad Miller was horrific in and of itself when they killed two police officers, but it was also awful when Joseph Robert Wilcox was gunned, down trying to come to the rescue of those in the Wal-Mart that the couple had entered."
A while ago ABC did a test that already should have put that fantasy to rest; the report can be found in two parts in YouTube: