What's most amazing about the epidemic of mass shootings...
...is that there are invariably be ones that you'll forget even happened, because others are so horrific and high profile that the others fall in the gap.
For example, before reading up on the mass shooting data spreadsheet from Mother Jones*, I had no current recollection of the shooting at a car wash in Melcroft, Pennsylvania where four people were shot dead.
What's amazing about this is that it happened January 28, 2018. One month ago.
I remember in between the Sandy Hook shooting in December 2012 and the Washington Naval Yard shooting in September 2013 there was a shooting at an apartment complex in Hialeah, Florida just outside Miami in July 2013. Seven people died. The shooting received almost no national media attention.
Despite being less than 10 years ago, I honestly can't remember how the April 2009 Binghamton New York shooting unfolded as it happened at an immigration center that left 14 people dead.
It's a sad testament to the unparalleled epidemic of mass gun shootings in highly developed first world countries that there have been so many of these that only the most shocking of the shocking remain in our collective consciousness.
* Available here:
https://docs.google.com/spreadsheets/d/1XV4mZi3gYDgwx5PrLwqqHTUlHkwkV-6uy_yeJh3X46o/edit#gid=0