No, there haven’t been 18 school shootings in 2018. That number is flat wrong.

The stunning number swept across the internet within minutes of the news Wednesday that, yet again, another young man with another semi-automatic rifle had rampaged through a school, this time at Marjory Stoneman Douglas High in South Florida.The figure originated with Everytown for Gun Safety, a nonprofit, co-founded by Michael Bloomberg, that works to prevent gun violence and is most famous for its running tally of school shootings."This," the organization tweeted at 4:22 p.m., "is the 18th sc