UPDATE: These are the 10 deadliest mass shootings in modern U.S. history
By Ciara Linnane, MarketWatch
From Las Vegas to Sandy Hook, mass shootings are a tragic and all too regular occurrence
The mass shooting at a country-music concert in Las Vegas (http://www.marketwatch.com/story/reports-of-dead-injured-after-mass-shooting-at-las-vegas-concert-2017-10-02) late Sunday is the worst ever to happen in modern U.S. history, and it's the deadliest attack on U.S. soil since the Sept. 11, 2001, attacks on New York and Washington, D.C.
These are the top 10 mass shootings:
1. Las Vegas: Oct. 1, 2017.
58 killed and more than 515 wounded.
Shooter: 64-year-old Stephen Paddock.