Country singer Jason Aldean visited University Medical Center on Sunday, just one week after the Oct. 1 shooting that claimed the lives of 58 concertgoers and injured hundreds of others at the Route 91 Harvest festival. 
 
 Jason Aldean’s wife, Brittany, posted this photo of the couple on her Instagram account on Sunday, Oct. 8, 2017. They visited patients at University Medical Center on Sunday. (Instagram/Brittany Aldean) 
 
 Country singer Jason Aldean visited University Medical Center on Sunday, just one week after the Oct. 1 shooting that claimed the lives of 58 concertgoers and injured hundreds of others at the Route 91 Harvest festival. 
 
 The hospital announced the visit in a post on Facebook. The post stated: 
 
 “Our extreme gratitude to Country Music Star Jason Aldean for visiting UMC today. Jason spent time with our patients who were critically injured during the Las Vegas shooting. His visit helped heal hearts and cheer those who were wounded in this tragedy. #vegasstrong.” 
 
 His pregnant wife, Brittany, posted a photo on Instagram of the couple embracing and looking towards the Mandalay Bay, which is where Stephen Paddock shot from a hotel suite at Route 91 Harvest Festival attendees. 
 
 “Feels surreal being back in Vegas today,” Brittany said on Instagram. “Visiting some of the strongest people we have ever met… fighting the toughest battle of them all… for their lives. You have helped us try to begin the healing process by seeing the strength each one of you have. Thank you for today. We will never forget.” 
 
 The day prior, Aldean performed on “Saturday Night Live,” declining to participate in a UFC ceremony to honor the victims and first responders at T-Mobile Arena, UFC president Dana White said. 
 
 Aldean was performing at the festival Sunday when the shooting started. 
 
 Contact Kailyn Brown at kbrown@viewnews.com or 702-387-5233. Follow @kailynhype on Twitter. 
 
 Feels surreal being back in Vegas today. Visiting some of the strongest people we have ever met… fighting the toughest battle of them all… for their lives. You have helped us try to begin to start the healing process by seeing the strength each one of you have. Thank you for today. We will never forget. #vegasstrong 🙌🏼 A post shared by Brittany Aldean (@brittanyaldean) on Oct 8, 2017 at 2:55pm PDT ||||| A lone gunman unleashed a rapid-fire barrage of bullets from the 32nd floor of a Las Vegas hotel late Sunday, killing at least 59 people and injuring more than 500 others attending a country music festival below, officials said. 
 
 It was the worst mass shooting in modern American history, and Stephen Craig Paddock was "solely responsible for this heinous act," Assistant Clark County Sheriff Todd Fasulo told reporters Monday night. 
 
 Paddock, 64, of Mesquite, Nevada, fired shot after shot from his room at Mandalay Bay Resort and Casino down on the crowd of about 22,000, sending terrified concertgoers running for their lives. 
 
 "We heard what sounded like firecrackers going off. Then all of a sudden we heard what sounded like a machine gun. People started screaming that they were hit," witness Meghan Kearney told MSNBC. "When we started running out, there were probably a couple hundred [people] on the ground." 
 
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 She added: "People kept dropping and dropping. ... People were getting shot one foot away from us. People were trying to save their friends. There were gunshots everywhere. Helping them would've meant that we got shot, too." 
 
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 59 people were killed and at least 527 others were injured in the deadliest mass shooting in modern U.S. history. 
 
 Authorities identified the gunman as Stephen Craig Paddock, 64, of Mesquite, Nevada. They said he acted alone. 
 
 Investigators found 23 firearms in Paddock's room at Mandalay Bay Resort and Casino and 19 more at his home. 
 
 President Donald Trump, who will visit Las Vegas on Wednesday, called the shooting "an act of pure evil." 
 
 Police responded to reports of the shooting just after 10 p.m. (1 a.m. ET). Clark County Sheriff Joseph Lombardo told reporters Monday that authorities believe Paddock killed himself before police entered his room. Officials had said earlier that police fatally shot Paddock. 
 
 Authorities were digging into Paddock's history. Other than a citation he received several years ago that was "handled as a normal practice" by the courts, he had no criminal background, Lombardo said. 
 
 Paddock is believed to have checked into the hotel on Thursday, Lombardo said. Fasulo said that he had 23 firearms in his room and that investigators found 19 more at his home. 
 
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 It wasn't clear whether Paddock had specifically requested a room on a high floor that overlooked the concert venue. Hotel employees had been in his room before the shooting and didn't notice anything unusual, according to Lombardo. 
 
 Two broken windows could be seen from the 32nd floor of the hotel, curtains billowing out. Law enforcement officials said Paddock had connecting rooms or a suite and ran between the windows, firing out of both, either to get a different vantage point or to avoid return fire. 
 
 They believe he smashed the windows with a something like a hammer before he started firing. 
 
 The shooting started while performer Jason Aldean was onstage. Witnesses described a chaotic scene of back-to-back bullets raining down from above, lasting for up to 10 minutes. 
 
 Fellow performer Jake Owen said he was standing about 50 feet from Aldean when the shots started. 
 
 "It got faster and faster, almost like it was an automatic rifle," Owen said. "At that point, everyone on stage started running everywhere." 
 
 Owen dashed by victims covered in blood and eventually found shelter in his bus. The gunfire still hadn't stopped by the time he got there, he said. 
 
 "It wasn't something that was quick. It was chaos for a pure seven to 10 minutes," he said. 
 
 A map shows the area of the shooting in Las Vegas. NBC News 
 
 Flags at the White House and the U.S. Capitol were lowered at half-staff on Monday. President Donald Trump, who said he would visit Las Vegas on Wednesday, called the shooting "an act of pure evil." 
 
 "Hundreds of our fellow citizens are now mourning the loss of a loved one," Trump said at a news conference. "We cannot fathom their pain. We cannot imagine their loss. To the families of the victims, we are praying for you, and we are here for you." 
 
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 The shooting isn't believed to be connected to international terrorism. Authorities haven't said what kinds of weapons were found. 
 
 A former Clark County sheriff, Bill Young, said his 22-year-old daughter was at the concert. Young told MSNBC that his daughter said that the weapon "sounded like a machine gun" and that she and her friends took cover under a desk. 
 
 Live Blog: Latest Updates on the Concert Massacre 
 
 "I picked up the phone, my cellphone, and she was screaming and yelling, 'Dad, dad, dad, dad, somebody's shooting at us, and I don't know what to do.' She was hysterical, and I tried to just calm her down," Young said. 
 
 "She could hear the gunshots — sounded like a machine gun, she said — and they didn't know where they were coming from," Young said. "She had nowhere to take cover, so I told her just to run as fast as she could, as quick as she could, out of the arena. Get as far away from it as she could where she thought the line of fire might be." 
 
 Related: Full Coverage of the Las Vegas Shooting 
 
 At least one off-duty Las Vegas police officer was shot, Lombardo said. Several other off-duty police officers are believed to be among the dead and injured. 
 
 The massacre put the normally bustling Strip at a standstill. Flights in and out of the Las Vegas airport were temporarily halted. 
 
 Police found Paddock's roommate, Marilou Danley, 62, and don't think she was involved, Lombardo said, adding that the investigation is ongoing. 
 
 Police searched their home in Mesquite, about 80 miles from Las Vegas. 
 
 Related: Photos Capture Chaos of Concert Massacre 
 
 The suspect's brother Eric Paddock, of Orlando, Florida, told NBC News that he was "dumbfounded" by the shooting. 
 
 "He was just a guy," Eric Paddock said of his brother. "He lives in Mesquite, he went to the hotels, he gambled, he went to shows." 
 
 "We are completely at a loss," he added. 
 
 Senior law enforcement officials and a Las Vegas casino executive said Stephen Paddock had made several large gambling transactions in recent weeks, including some of more than $30,000 a day. It wasn't known whether they were losses or wins. 
 
 In 2012, Paddock sued the Cosmopolitan Hotel in Las Vegas for a slip and fall. Martin Kravitz, the lead attorney for the hotel, described him Monday as "bizarre" and said "he dressed slovenly to the deposition." 
 
 "His answers were vague, not very thoughtful," Kravitz said. "He wasn't angry. ... This is not a guy who would have really stood out in your mind." 
 
 He added that Paddock was wearing "crappy flip-flops." 
 
 "You wonder what a guy like this is doing at the Cosmo," he said. 
 
 Aldean, who was named the Academy of Country Music's Entertainer of the Year in April, was performing on the final night of the three-day Route 91 Harvest festival at the Las Vegas Village when the shots started. He later said via Instagram that he and his band were safe. 
 
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 "I still don't know what to say but wanted to let everyone know that Me and my Crew are safe. My Thoughts and prayers go out to everyone involved tonight," he wrote. 
 
 Vice President Mike Pence tweeted his condolences after the "senseless violence." 
 
 "The hearts and prayers of the American people are with you. You have our condolences and sympathies," he wrote. "To the courageous first responders, thank you for your acts of bravery." 
 
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 Hillary Clinton also expressed her grief in a tweet: "The crowd fled at the sound of gunshots. Imagine the deaths if the shooter had a silencer, which the NRA wants to make easier to get." 
 
 She added: "Our grief isn't enough. We can and must put politics aside, stand up to the NRA, and work together to try to stop this from happening again." 
 
 Police urged families looking to locate missing loved ones to call 1-866-535-5654. 
 
 Richie Duchon and Andrew Blankstein reported from Los Angeles. F. Brinley Bruton, Rachel Elbaum and Yuliya Talmazan reported from London. Pete Williams reported from Washington. Elizabeth Chuck and Tracy Connor reported from New York. Alex Johnson reported from Los Angeles. ||||| This timeline has been updated with information provided by the Metropolitan Police Department during a 5 p.m. briefing on Wednesday. 
 
 A screen displays part of the updated timeline of the Las Vegas Strip shooting, released by the Metropolitan Police Department on Wednesday, Oct. 5, 2017. (Rachel Crosby/Las Vegas Review-Journal) 
 
 Stephen Paddock 
 
 Festivalgoers attending the Route 91 Harvest Festival are patted down after being evacuated to the Thomas & Mack Center early Monday morning, Oct. 2, 2017, following a shooting situation on the Las Vegas Strip. Richard Brian Las Vegas Review-Journal @vegasphotograph 
 
 A victim from Sunday's mass shooting at the Route 91 Harvest Festival is taken to a Las Vegas hospital, Monday, Oct. 2, 2017. Joel Angel Juarez/Las Vegas Review-Journal @jajuarezphoto 
 
 A Las Vegas police officer patrols Terminal 1 at McCarran International Airport in Las Vegas, Monday, Oct. 2, 2017. Erik Verduzco/Las Vegas Review-Journal 
 
 Windows from Mandalay Bay are broken after a shooting occurred leaving at least 59 dead and 500 injured in Las Vegas, Monday, Oct. 2, 2017. Joel Angel Juarez Las Vegas Review-Journal @jajuarezphoto 
 
 An American Airways plane flies over TV satellite trucks near McCarran International Airport on Monday, Oct. 2, 2017, in Las Vegas. Bizuayehu Tesfaye Las Vegas Review-Journal @bizutesfaye 
 
 This timeline has been updated with information provided by the Metropolitan Police Department during a briefing on Monday, Oct. 9. 
 
 Sunday 
 
 9:40 p.m.: Jason Aldean takes the stage as one of the last performers on the final night of the three-day Route 91 Harvest country music festival. 
 
 9:59 p.m.: Jesus Campos, a Mandalay Bay security officer, is fired upon while responding to an open-door alarm from a room down the hall from where the 32nd-floor suite Stephen Paddock was staying. Clark County Sheriff Joe Lombardo had said that Campos was fired upon after Paddock fired on the concert, but he later amended the timeline to show that Campos was shot in the leg before Paddock “shot at the outside world.” 
 
 10:05 p.m.: As Aldean sings his hit “When She Says Baby,” gunfire erupts, directed into the crowd of approximately 22,000 people attending the concert. Metropolitan Police Department officer reports shots fired from the adjacent Mandalay Bay hotel. 
 
 
 
 John Locher/The Associated Press 
 
 10:12 p.m.: The first two officers arrive on the 31st floor of Mandalay Bay and announce the gunfire is coming from directly above them. 
 
 10:15 p.m.: The last shots are fired from the suspect per (officer’s) body-worn camera. Metro officers are unsure why Paddock stopped firing at the time. 
 
 10:17 p.m.: The first two officers arrive on the 32nd floor. Campos informs them of the shooter’s location. 
 
 10:26-10:30 p.m.: Eight additional Metro officers join the other officers on the 32nd floor, no longer hearing the shooter actively fire. They clear all the rooms on the floor and look for injured people. 
 
 10:30 p.m.: University Medical Center trauma surgeon Jay Coates receives a call to report to UMC. Within an hour, UMC had eight trauma operating rooms up and running. Other Las Vegas Valley hospitals also begin receiving patients. 
 
 11:00 p.m.: Police scanner traffic details multiple reports — all false — of active shooters at other Strip hotels. 
 
 11:20 p.m.: Police swarm the 32nd floor room at Mandalay Bay where the shooter is holed up. Inside, they find Stephen Paddock, 64, of Mesquite, dead of a self-inflicted gunshot wound. Officers observe a second door in the room that could not be accessed from their position. 
 
 11:23 p.m.: I-15 between Tropicana Avenue and Russell Road and surface streets near the scene are closed to traffic. 
 
 11:27 p.m.: A second breach was set off in the hotel suite to allow officers access to the second room. Officers find the room empty and announce over the radio the suspect is down. 
 
 Midnight: More than 25 flights are diverted from McCarran International Airport as flight controllers reconfigure flight paths to ensure that no aircraft are hit, according to airport spokeswoman Christine Crews. 
 
 Monday 
 
 1:30 a.m.: Clark County Sheriff Joe Lombardo announces more than 20 people are dead and more than 50 people are injured in the shooting. 
 
 2:15 a.m.: I-15 reopens for through traffic. Eastbound off-ramps between Sahara Avenue and Russell Road and surface streets in the area remain closed. 
 
 3:43 a.m.: Metro identifies Paddock as the shooter and described Marilou Danley as a person of interest associated with him. 
 
 4 a.m.: United Blood Services begins taking donations at its West Charleston Boulevard location, three hours before normal opening time. The line soon snakes around the building and donors wait up to eight hours to give blood. 
 
 4:43 a.m.: Flamingo Road reopens in both directions, while Tropicana and Russell remain closed. 
 
 5 a.m.: Police say they located Marilou Danley, identified earlier as a person of interest associated with Paddock, outside the country and interviewed her. Police said they do not believe she was involved with the shooting. 
 
 5:54 a.m.: Clark County School District says in a Twitter post that police have given the clearance for schools to remain open on Monday. The district later says all student absences will be excused. 
 
 6 a.m.: Metro announces officers are executing a search warrant at Paddock’s Mesquite home. 
 
 6:30 a.m.: Clark County Commission Chairman Steve Sisolak announces the creation of a GoFundMe fundraising site to provide relief and financial support to victims and their families. 
 
 8:04 a.m.: MGM announces that a lockdown on guest rooms at Mandalay Bay has been lifted, except for the 32nd floor. Roads are reopened, except for South Las Vegas Boulevard, between Russell Road and Tropicana Avenue, and West Hacienda Avenue, between Frank Sinatra Boulevard and Reno Avenue. 
 
 8:30 a.m.: Clark County Sheriff Joe Lombardo announces the death toll has increased to 58, with 515 injured. He says officers found additional weapons inside Paddock’s Mesquite home. 
 
 11:50 a.m.: Nye County sheriff’s office denies media reports of active shooters at Pahrump schools. 
 
 3 p.m.: Police confirm at least 59 deaths and 527 injured. They say 16 rifles and one handgun were found in Paddock’s room at the Mandalay Bay and an additional 18 rifles in the Mesquite home. They say a search warrant is being executed at another home Paddock owned in Reno. Lombardo also says that ammonium nitrate, which can be used to make bombs, was found in Paddock’s car at the hotel.
– Country singer Jason Aldean returned to Las Vegas on Sunday in an unannounced trip to visit some of those injured in last week's mass shooting. "Feels surreal being back in Vegas today," his wife, Brittany, wrote on Instagram. "Visiting some of the strongest people we have ever met." Aldean, who was on stage when the shooting began, visited University Medical Center, reports the Las Vegas Review-Journal. Photos have surfaced of his visit with patients, and the hospital thanked him on Facebook. The day before, Aldean made a surprise appearance on Saturday Night Live to sing Tom Petty's "I Won't Back Down."