What happened: October 1, we saw the worst mass fatality shooting spree in this country’s modern history. As of this writing, there are reported to be 58 people dead and over 500 injured. All apparently the victim of a lone gunman shooting from an elevated hotel room window during a music festival below that attracted over 22,000 country music fans to Las Vegas.
Why it's significant: There are two significant facts. First, a single actor was able to inflict so much carnage in such a relatively short period of time, and that despite what, by all accounts, was an effective a rapid response by first responders, the death toll was horrendous and the casualty count overwhelming.
Second, is that even with a robust response system like the Las Vegas metro area has, with over 1,400 firefighter-paramedics and -EMTs between Las Vegas FD, Clark County and North Las Vegas Fire Depts., there is no way to quickly and efficiently manage that many casualties during an active shooter incident.