Mass Shootings In America Are Becoming More Common -- And More Deadly

Orlando,Las Vegas,Sutherland Springs: three of the worst mass shootings in modern U.S. history all happened in the past 17 months. 

As Denver journalistKyle Clarkgrimly observed on Monday, the 1999 Columbine High School massacre that once shocked the world when two gunmen killed 12 students and 1 teacher, has been pushed off the list of the top 10 deadliest mass shootings in recent U.S. history. 

Now, three shootings in the past 17 months are on the list, and, asCNN pointed out,two of the five deadliest mass shootings in modern U.S. history occurred in the last 35 days.

In June 2016, 29-year-old Omar Mateenkilled 49 people and wounded 58when he opened fire in Orlando’s Pulse Nightclub during Pride month. At the time, the attack was consideredthe worst mass shooting in modern U.S. history.

One year and four months later, 64-year-old Stephen Paddock opened fire on 22,000 people at a country music festival in Las Vegas, killing 58 and injuring hundreds more. The massacre remains as the deadliest mass shooting in modern U.S. history.

Following the Las Vegas shooting, theNew York Times published an interactive feature showing that in the 477 days that had passed since the Pulse nightclub shooting, there had been 521 mass shootings, and no action from Congress on tougher gun laws.

On Sunday, just one month later, a lone gunmankilled at least 26 churchgoers and injured 20 others at First Baptist Church in Sutherland Springs, Texas. It was the deadliest mass shooting in the state’s history. The victims range in age from 5 to 72. 

According toMass Shooting Tracker,there have been 377 mass shootings in 2017. 

This article originally appeared on HuffPost.