Daily tracking of the hundreds of mass shootings in the U.S. each year.
After enabling this skill, just say, "Alexa, what's my flash briefing"
This briefing tracks a mass shooting as an incident where four or more people are shot in a single shooting spree. This may include the gunman himself, or police shootings of civilians around the gunman.
The data is crowd sourced and available at: https://www.massshootingtracker.org/