Well i wont back down and celebrating an american original. Rock legend tom petty passing away overnight just days after his final concert. This morning, tributes pouring in from around the world. Wont back down and we do say good morning, america. As you can imagine a lot to get to on this Tuesday Morning. Here is a live look at las vegas. Still so many questions about how and why that tragic shooting happened. What a staggering death toll, 59, at least 59 killed. More than 520 injured. The victims were just there to enjoy the concert sunday night. Now the entire city and country reeling. Look at the cover of the las vegas newspaper. Unimaginable. So, so true. People are paying their respects honoring the lives of those lost and take a look at the Las Vegas Strip. Usually so bright, but last night turned off all the lights and it went dark. World news tonight anchor david muir is leading us off this morning. Hes there in las vegas. Good morning, david. Reporter robin, good morning. Its almost impossible to wrap your head around that number you just mentioned, 59 people were killed in this attack. There are headlines of patients at hospitals throughout las vegas and this morning, we know more about the discovery made on the 32nd floor of the mandalay in the hotel room of Stephen Paddock. We know 23 firearms were pulled from that room. Another 19 firearms at his home. The total, 42 weapons. Investigators this morning trying to answer that question, why . [ gunfire ] overnight new details inside the four minutes of terror thats just a firecracker. Reporter 10 08, a hail of gunfire hailed on concertgoers. Coming from the 32nd floor of the mandalay hotel. We have an active shooter inside the fairgrounds. Reporter concertgoers telling us they sought shelter anywhere they could to escape the gunfire. Were in this ice cream reporter there were pauses in the gunfire when people would make a run for it and another round would begin. That was probably the most terrifying part was honestly thinking that it was over and you think, okay, were okay to stand up and then it was quiet, what felt like for awhile and crouch up and go low and it would just start all over again. Reporter 11 20 sunday night outside room 135 s. W. A. T. Teams closing in on the shooter identified as 64yearold Stephen Paddock. Hotel fire alarms going off from the intense gunfire smoke giving away his location. Authorities say he checked into the hotel last thursday. Everyone in the hallway needs to move back. All units move back. Breach, breach, breach. Reporter the suspect dead from a selfinflicted gunshot wound. In his hotel suite, 23 firearms, police say he acted alone. The 527 wounded carried out by wheelbarrow, pickup truck, even barricades turned into stretchers. 59 others killed in what is now the deadliest mass shooting in modern american history. In the aftermath an open field now crime scene strewn with debris. Reports that cell phones left behind rang for hours as loved ones desperately tried to reach their relatives. And among those who lost their lives, 29yearold sonny melton, a registered nurse from tennessee, who died while shielding his wife heather, a surgeon, with his own body. 35yearold mother of three Hannah Ahlers seen here before the concert began. Its okay to mourn those you love. Reporter 34yearold Las Vegas Police officer charleston hartfield, off duty at the time, military veteran and father killed while helping others to safety of the his family and friends holding a vigil to honor his bravery. Weve all had tough day, hard days but we have to get through it and keep moving forward. Reporter amid such tragedy come the stories of heroism, Jonathan David smith credited with saving more than 20 lives when he broke down a security gate and formed a human chain to lead others to safety off the field. I ran back towards the shooting and there was one lady that was on the ground. I basically helped her up and just told her just to run. I basically just told her we got to go. She didnt want to move. At that point, more shots rang out. I proceeded to go with the two gentlemen carrying the lady. Look for paramedics. Reporter jonathan said there was an offduty officer who helped him taking the shirt off his back and using it as a tourniquet. He said the bullet is still lodgeed in his neck. Doctors did not want to take it out fearful they would do more damage. There is a trauma surgeon in las vegas who said overnight that he treated so many people he didnt know their names. He didnt know who they were. They were just bringing bodies in and said one thing was uniform about them all of he said this wasnt some ordinary street weapon, the kind of ammunition used did maximum damage inside all of these people who were rushed into ers throughout las vegas. David, well talk more about that and get back to you in a moment. We are learning new details about the gunman but his motive remains a mystery. No message, no warning signs surfaced and his neighbors surprised. His brother shocked and our chief investigative correspondent brian ross here with what we now and dont know. Authorities say they very much need to talk with the longtime girlfriend of the shooter hoping she will answer some key questions about what Stephen Paddock was up to in the last few months as he acquired this massive arsenal and abc news learned has sent huge amounts of money to someone overseas. When police raided his home in a Retirement Community in mesquite, nevada, they found even more evidence of his secret attack plans. In excess of 18 additional firearms, some explosives and several thousand rounds of ammo along with some Electronic Devices that were valuating at this point. Reporter but they did not find girlfriend marilou danley, a onetime casino hostess for high rollers who later in the day was located in asia. The sheriff says his officers continue to investigate what about anything she knew about her boyfriends plans. We are continuing the investigation into that female, there are several questions that need to be answered. Reporter Authorities Say they want to know what she knows about tens of thousands of dollars paddock has been sending to someone in the philippines. She is currently out of the country. We are making arrangements to contact her upon her return. Reporter so far the motive behind the man who became the face of evil remains a mystery. His brother describes him as a divorced multimillionaire with no children whose only passion was gambling. A regular at vegas casinos. He was a wealthy guy and he liked to play video poker. He played multihundred dollar a hand video poker. Reporter his family remembers him as a man who grew up without conviction. Steve had nothing to do with any political organization, religious organization, no white supremacist, nothing. Reporter his only encounter with the courts came six years ago as seen in this video after he slipped on the floor of a Las Vegas Casino and sued for damages. Despite paddocks efforts to claim painful injuries an arbitrator ruled in favor of the casino. Our descriptions of him were that he was slough lenly which he appeared to be on the video initially. He was carrying a beer in a paper bag. What we saw from the tape was a man who was probably drunk. Reporter the only known connection to crime was paddocks late father, a violent bank robber who spent seven years in the 1960s on the fbis most wanted list described as psychopathic, suicidal, armed and dangerous. As for that girlfriend, authorities tell abc news shes expected back in the country sometime this week. As the number and the seriousness of the questions for her continues to grow. Well, one of them being neighbors had seen them together just two weeks ago. Thats right. We believe she left out of the country about one week ago for reasons we dont know. We also know she had a social media account but so far no social media for paddock . Nothing we can find of paddock at all. Thanks very much. George, it is becoming clear the shooter was stockpiling weapons, firearound, ammunition, even explosives and Pierre Thomas is in washington with new details on what investigators have discovered. Good morning, pierre. Reporter good morning. The evidence is mounting and is truly chilling. The suspect had amassed an extraordinary arsenal of lethal weapons. Sources tell abc news the suspect was ready to go to war armed with 23 handguns and rifles, one of them an Assault Rifle modified to fire like a machine gun. Unlike any weapon used in recent mass casualty shootings. We have multiple arm i cant remembers up here. Reporter take a look at videos like in that show how it can be modified to fire much more quickly. Before. After. Abc news has learned some of the rifles were high powered. Go, go, go. Reporter capable of slicing through police body armor. This is classic wmd. This is a weapon in a man of mass destruction. Reporter we examined the first 90 seconds of the massacre. Hearing nearly 200 rounds fired. Hundreds more within the following minutes. The killer firing from more than 300 feet above, floor 32 with the crowd more than 1,000 feet away, apparently not a lot of skill required. Police and the fbi this morning trying to trace the guns, going to every store in the region. The gun store in mesquite, nevada, confirming paddock purchased guns here. The store saying he passed all necessary background checks, its unknown if these were the guns used in the rampage. And Something Else disturbing, according to a Law Enforcement source a camera was found in the hotel room perhaps to record the shooter. And they also discovered materials used to make explosives in his car and his house, robin. So very dark. Despite all these weapons theres no indication that investigators have been able to unveil that he was a how do you say expert marksman. Correct. Our experts are telling us there are so many people that were packed together in that crowd that the killing was so, so easy. All right, thank you, pierre. Michael. Thank you, robin. We have more now on the race to save those hurt in the las vegas attack. Nevada has just one Level One Trauma Center and that facility and the other hospitals trying to help hundreds of victims. Linsey davis is at the University Medical center with more. Good morning, linsey. Reporter and good morning, michael. Just to give you perspective on what the hospitals here have been dealing with, at umc which is a hospital right behind me just for an example, prior last night the total number of patients theyd ever received all at once was 17. Last night they admitted a total of 104. This morning, a look inside the race to treat the injured. Las vegas area hospitals working around the clock to help the hundreds of wounded. Desert springs has no available beds right now. Reporter medical personnel saying its like nothing theyve ever seen before. Weve actually had a number of mass casualty incidents come through this Trauma Center but nothing of this magnitude. Reporter at sunrise Medical Center they admitted 180 patients. It was nonstop. It was an oppressive evening. Reporter some like 18yearold addison short awaiting surgery. Her lower leg fractured, a bullet still inside. I tried to get up and my foot literally just felt like it was disconnected like i just couldnt run. Reporter the College Freshman says shes grateful for the stranger who helped pull her to safety. I really wish i knew who he was so i could thank him. Reporter hospitals including the ones here in las vegas regularly trained for mass casualty events. But does this compare with any kind of training . You know, our latest training ironically was with an er physician who was on duty in orlando the night of the pulse nightclub attack here just a couple of months ago. Reporter right, and that was so crucial because that physician that was on duty in orlando the night of the pulse nightclub attack was able to share with them what worked and what they could have done more effectively, michael. Linsey, we understand theres been an incredible outpouring of support, as well. Reporter yes, just for one example, the sheriff yesterday morning announced that there was going to be a go fund me page created for the victims. In seven hours they raised a million dollars, michael. Wow. Thats great. All right, linsey davis, thank you so much. This tragedy has struck close to home for everyone here at disney, abc, our disney ceo bob iger telling us this morning of the loss of carrie barnette, who was on the Culinary Team at disneyland and had just celebrated ten years working here. He called her death a senseless horrific act and a terrible loss for so many. Our prayers go out to her friends and family and say theyre proud she worked at disney. We were proud to have her as a member of our team and also learning of another disneyland employee, Jessica Milam was also seriously injured in vegas hospitalized this morning and were hoping for a speedy recovery for her and, of course, for all others who were hurt in this incident . We have to wrap our airports around all the victims and their families. President trump led a moment of silence at the white house yesterday and ordered federal buildings to fly flags at halfstaff. He heads to vegas tomorrow after a visit to puerto rico today and jon karl is in san juan and, jon, the president did lead that moment of silence, called for unity yesterday but his teams will tried to stop any debate about gun control before it even begins. Reporter absolutely, george. This is a president that got elected by talking about his commitment to the second amendment, by talking about how good a friend he was of the nra so there have been calls from democrats, some very prominent calls from democrats to look at gun control again including Hillary Clinton coming out with a tweet saying, our grief is not enough. We must stand up to the nra. That is not a message that is being received well at the white house, not at all. The president goes to puerto rico today, las vegas tomorrow. Reporter he does. Hes going to be several hours on the ground in puerto rico getting a firsthand look at the damage here. The white house said he is willing to meet with the mayor of san juan who hes feuded with so publicly. Unclear if that will happen. As for the trip to las vegas, hes going to be meeting with First Responders, with Law Enforcement, with the families of the victims, they say he has said he will be there perhaps more than a day. He may actually be over there longer. That las vegas, of course, is a city that the president has ties to. He has properties there. He has spent a fair amount of time in las vegas. And, jon, so many in the white house seem shaken by this yesterday. Reporter they really did. If you looked, george, rather emotional moment during the White House Briefing at the very beginning from Sarah Huckabee sanders talking about the bloodshed, talking about the victims, reading a bible verse and choking up with tears. Clearly shaken by this. This cant help but shake you. I remember the reaction of barack obama and the white house staff with the newtown tragedy. It looked something similar to what we saw at the white house yesterday. Of course, it does immediately raise the questions what do we do about it . Jon karl, thanks very much. That is the question. And thats something jimmy kimmel brought up last night. He is a las vegas native and he made an emotional plea in the wake of that deadly shooting. Heres a look. Here we are again in the aftermath of another terrible, inexplicable, shocking and painful tragedy. This time in las vegas which happens to be my hometown. Of course, we pray for the victims and for their families and friends and we wonder why even though theres probably no way to ever know why a human being would do Something Like this to other human beings who were at a concert having fun and listening to music. Echoing the sentiments of so many and took a big stand on gun control calling out lawmakers who every time this happens and people say, well, its not the right time to talk about it, dont make it political and saying, gosh, i mean after newtown, after orlando, after what happened in las vegas, when is the right time to discuss it . He brought that up. When you see the arsenal he had, the kind of weapons, how they were used, tuzze just unbelievable. Amassing that kind of arsenal. All right. And just west of denver people were stuck on i70 for hours because they had to shut down, heavy wet snow taking down power lines and trees in parts of colorado and theres more to come in montana. Thats it for now but weve got a check of your local weather in just 30 seconds. A chilly start again but were dry on storm tracker6 live double scan. A lot of suburbs in the 40s, philadelphia in the mid50s. Stepping outside we do have plenty of sunshine over the horizon. And youll need your shades as you head out the door and climb behind the wheel. Your exclusive accuweather 7day forecast, todays high 75, sunny and pleasant. Tomorrow sunny and warm, 78. And partly sunny thursday, 84. Friday now looks like a day where we might see a shower especially in the northern and western suburbs but a high of 80 and then 82 on saturday and sunday. Vegas. An incredible or those incredible acts of courage. 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