Authorities are working to learn more about Stephen Paddock, the gunman who opened fire on a crowd of country music fans in Las Vegas, killing at least 59 of them.

And we’re just beginning to learn the names of the victims in what’s being called the deadliest mass shooting in modern U.S. history.

They include 28-year-old Afghanistan Navy vet Chris Roybal, a mother of three named Hannah Ahlers, special education teacher Sandy Casey, and Las Vegas Police Officer Charleston Hartfield. He was off duty while attending the concert.

Fifty-nine people were killed and more than 500 wounded when Paddock opened fire on the crowd of some 22,000 people at a country music concert.

Christy Tech was in the front row of the concert.

“When I stood up from my crouched position in front of the stage, I could look in a very small area and I saw 20 bodies,” she said.

When asked how to comprehend such tragedy, she responded, “You don’t.”

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