It's a photo you see all the time on social media: two friends, arm in arm, enjoying themselves at a concert.
Brian MacKinnon and Adrian Murfitt, both from Anchorage in Alaska, were at the Route 91 Harvest music festival in Las Vegas when they took the opportunity to capture the moment with a selfie.
Then the gunshots. When Mr Murfitt turned around to see what was happening, he took a bullet in the neck. He died in his friend's arms.
Gunman Stephen Paddock had begun raining down thousands of rounds of ammunition on the crowd of music lovers from the 32nd floor of the nearby Mandalay Bay Resort and Casino.
The death toll stands at 59 people. A further 527 people were injured.
Brian MacKinnon with friend Adrian Murfett. Photo: Facebook/Brian MacKinnon
One of the victims was 56-year-old John Phippen???, who was dancing at the festival next to his son, Travis, when he was shot in the back.
Travis, an emergency medical technician, was shot in the arm during the attack, however he managed to carry his father to a car that took them to hospital where he died.
"He was my best friend," Travis told the LA Times. "He never did anything wrong to anybody. He was always kind and gentle. He was the biggest teddy bear I knew."
Victim Neysa Tonks. Photo: GoFundMe
Las Vegas woman Neysa Tonks was another of the slain. She was a mother of three boys, according to a GoFundMe campaign created by her employer Technologent.
"How happy and lucky I feel that she was part of my life," her brother AJ Yerage told KUTV. "I can hear her laugh, her voice in my head and my heart right now."
Charleston Hartfield, 34, an off-duty Las Vegas police officer, was among those killed.
"He was probably busy helping others," Hartfield's friend Troy Rhett told the Las Vegas Review-Journal.
"I don't know a better man than Charles."
Carrie Barnette was shot at the country music concert. Photo: Disney
Disneyland employee Carrie Barnette???, 34, was up front close to stage when she was shot to the left side of her chest, her cousin told The Arizona Republic.
Walt Disney Company chairman and CEO Robert Iger??? wrote on Twitter that it was a "senseless, horrific, act, and a terrible loss for so many".
"We mourn a wonderful member of the Disney family: Carrie Barnette. Tragic," he wrote.
Canadian Jessica Klymchuk???, 28, was a librarian and the single mother of four children, the Globe and Mail reported.
"She's a very good mother. She's raised four beautiful children," Ms Klymchuk's grandmother Margaret told the paper.
Sonny Melton, pictured with wife Heather Melton. Photo: Facebook/Heather Melton
Festival-goer Sonny Melton, a 29-year-old nurse from West Tennessee, was killed as he tried to shield his wife, Heather Melton, from the gunfire.
"He saved my life. He grabbed me and started running when I felt him get shot in the back," she told local TV station WSMV.
"I want everyone to know what a kind-hearted, loving man he was, but at this point, I can barely breathe."
Mr Melton was a registered nurse who worked at the emergency room and ICU at Henry County Medical Centre in Tennessee. He also assisted his wife in surgery.
Denise Salmon Burditus, with husband Tony Photo: Facebook/Denise Salmon
Denise Salmon Burditus, a semi-retired country music fan, was also believed to be among the dead.
She had uploaded a photo to Facebook about two hours before the shooting showing she and her husband, Tony, in front of the Route 91 concert stage.
One of her Facebook friends shared the photo saying, "my friend's wife of 32 years died in his arms last night in the Vegas shooting".
Quinton Robbins. Photo: Facebook/Quinton Robbins
Quinton Robbins, 20, was identified as one of the victims by friends and family.
The Nevada native, who lists his job online as a recreational assistant at the City of Henderson government, was described by his aunt as "an amazing young man who had a huge heart and would do anything for anyone".
"He overcame health issues and did not let them interfere with living his life to the fullest," she posted.
Mike McGarry, a financial adviser from Philadelphia, was at the concert when he heard hundreds of shots ring out. He said he used his body to shield children.
"It was crazy - I laid on top of the kids. They're 20. I'm 53. I lived a good life," McGarry said.
White House spokesman Sarah Sanders became emotional on Tuesday as she paid tribute to Sonny Melton and acknowledged the heroics of Mr McGarry.
Mr Melton was "selfless ... giving up his life to save hers", she said.