ROBERT SIEGEL, HOST:
The numbers out of Las Vegas are staggering - 59 dead, more than 500 wounded. This is the nation's deadliest mass shooting in modern history.
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DEAN HELLER: We'll never forget October 1, 2017. Think about that. October 1, 2017, will be a day to remember here in Las Vegas.
SIEGEL: That was Nevada Senator Dean Heller at a news conference today. Some of the sound you're about to hear in the next two minutes is disturbing.
KELLY MCEVERS, HOST:
October 1, 2017, around 10 p.m. local time a single gunman opens fire on a country music festival in an open-air venue.
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UNIDENTIFIED MAN #1: One-six-nine SAM, we got shots fired 415 ASO, Route 91, sounded like an automatic firearm.
UNIDENTIFIED WOMAN #1: Copy code red at 169 SAM. They have shots...
UNIDENTIFIED MAN #1: (Unintelligible). It's coming from upstairs in the Mandalay Bay - upstairs Mandalay Bay, halfway up. I see the shots coming from Mandalay Bay halfway up.
MCEVERS: The gunman shoots at a crowd of some 22,000 people from the 32nd floor of the Mandalay Bay Resort and Casino hotel, which is across the street from the venue.
SIEGEL: Gunshots interrupt the concert and continue after the music has stopped. Cell phones captured the sounds of gunshots and people running for their lives.
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SIEGEL: Twenty-one-year-old Mia Uribe (ph) was there.
MIA URIBE: I was in shock because I still thought that it was fireworks. And when I heard someone yell gun and everyone was running towards us, everyone was telling me to get down. There were people jumping over us. It sounded like pops over and over and over again. And it didn't stop. There was just a continuous flashing light.
MCEVERS: Miguel Martinez-Valle, a reporter at FOX5 Las Vegas, says people in the concert lot didn't know where to go.
MIGUEL MARTINEZ-VALLE: The fences came down. People actually trampled the fences trying to get out, to run away from the area. And people didn't know which direction to go.
MCEVERS: A SWAT team eventually located the gunman's hotel room.
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UNIDENTIFIED MAN #2: I have the hallway of the suspect's room on the 32nd floor.
MCEVERS: When officers entered the room, Paddock was dead.
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UNIDENTIFIED WOMAN #2: We need the air clear for Zebra 20. They have one suspect down inside the room. Zebra 20 has one suspect down inside the room.
SIEGEL: Police say he committed suicide, and there are no answers yet to the question why he did what he did. Transcript provided by NPR, Copyright NPR.