NICK VEGAS's video: STREETS IN FRONT OF MANDALAY ROUTE 91 HELICOPTERS NEWS CREW

Gail Davis, who was at the Las Vegas outdoor country music concert Sunday night when a gunman opened fire, witnessed the terrifying scene at which at least 59 people were killed and more than 500 others were injured. She described the chaotic scene to "CBS This Morning." "We went there to see Jason Aldean," she said. "We were standing, like, maybe halfway up. He came on and about 20 to 10, he sang about five songs and all of a sudden we heard about three or four little pop, pop, pops, and everybody looked around and said, 'Oh, it's just firecrackers.' And then we heard pop, pop, pop, and it just kept going and going, and my husband said, "That's not firecrackers. That sounds like a semi-automatic rifle.' And then everybody started screaming and started to run. SEE THE REST @ https://www.cbsnews.com/news/las-vegas-mandalay-bay-shooting-witness-it-was-just-chaos/