Now. From nbc news World Headquarters in new york this is nbc nightly news reporting tonight, lester holt. Good evening. As we begin here tonight, Severe Weather is breaking out in several states across the south. Tornado wa are up within a big swath, including the dallas ft. Worth metroplex as well as Southeast Louisiana where a strong storm blue 8 wheelers on their sides. Americans across 13 states are entering what is expected to be a multiday outbreak of storms bringing hail lightning, and as many as two dozen tornados. Al roker is watching the storms right now. We are seeing a very volatile situation. Wat storms approaching louisiana. 8,000 lightning strikes in less than ten minutes. Were also seeing very strong storms. The areas in yellow are tornado watches, red tornado warnings. Especially in kansas right now. A very dangerous situation. For tonight, hutchenson kansas. Were looking at the risk of severe storms. Dallas shreveport 32 Million People at rick. This danger continues into saturday. Charlotte, atlanta st. Louis. Knoxville. Damaging winds, torrential downpours and tornados. And this moves into sunday as well. Again, the same area. Oklahoma city dallas on into san antonio. 16 million folks at risk. And weve got flash flooding possibilities anywhere from three to five inches of rain throughout parts of arkansas kansas and on down into louisiana, lester. And the danger is this is going to continue on right into next week. So flooding and a lot of damage expected this weekend. All right, al thanks very much. Now to a terrifying scene on camera. Dozens of students on stage, dancing and singing outside indianapolis when the e collapsed, sending the students plummeting into the orchestra pit below. We have the report from westfield, indiana. Reporter it baents the big finish to the show of 80s music the students had planned. Singing turned into screams as performers plunged 12 feet to the concrete floor of an empty okay spra pit, when a temporary stage gave way in front of a packed auditorium. Thought it was planned. But it wasnt. And you hear the screams. People were running up to the stage trying to help people out. Reporter 16 were treated for broken bones, torn ligaments and possible concussions. Today the last one was released. Im sure no one in a million years thought this would ever happen. Reporter the singer, nicole grish had just stepped off moments before it collapsed. When you looked down what did you see . I dont remember francely because i immediately started crying. I remember hearing them screaming, which and hearing people say help me which was just terrible to hear. Reporter musician omar sants yaw goe was the one in the spotlight. One minute im celebrating. Im in the hole. Reporter officials are investigating, looking at the schools maintenance records. We all want the same answers. We want to make sure this never happens against here or anywhere. R classes were held today but attendance was optional. Taylor knight was one of many cast members who fell and returned to school. We all just kind of hugged. And it was good to be with each other again. Reporter after a night that few will soon forget. John yang nbc news, westfield, indiana. Tonight baltimores mayor and y leaders are calling for calm a might be the most massive protest yet af the death of a man who suffered serious injury while in police custody. Nbcs tom costello continues to follow the story for us. Reporter today, confirmation from Baltimore Police that once freddie gray was aroasted and placed into a police van arresting officers failed to put a seat belt on him. We know he was not buckled in the transportation wagon as he should have been. No excuses for that period. Rep also today, police said gray appeared to be talking and moving in the van until the third stop. Among the questions, was gray given whats known as a rough ride . Jarring stops and starts that might have caused his fatal injury . Were going to have to prosecute them. So giving too much information to you on the front here may jeopardize that prosecution. Rep the six days since gray died of a spinal cord injury demonstrators have demanded answers. Among the protesters this week entire families including 11yearold david. Im worried about me dying. And im thinking about my neighborhood stretched out with crack and i dont want to die. Reporter now they are ratcheting up the pressure. An end to the cycle of black men being shot down having their spines broken and their backs broken. The people of baltimore are deg this. Reporter but today, surrounded by civic leaders, the mayor urged all protesters to remain peaceful. This community and whole community is a community seeking justice for mr. Gray. So if youre going to come here come to help us, not to hurt us. R baltimore please are also asking witnesses to come Baltimore Sun reports that over the past decades, two suspects have won court cases against the city for being paralyzed while riding in those police vans. Tom costello, in baltimore. Y seas a stark reminder of the growing Terror Threat that hangs over so many european countries. Today a highly coordinated series of raids in italy resulted in the arrest of terror suspects in a network that had once plotted an attack on the vatican and the previous pope himself. Richard engle has the details. The target of terror reportedly Pope Benedict himself. A plot to target the vatican, italian prosecutors say, by a major Al Qaedalinked cell spanning italy a cell broken up today with police raids in seven areas, recorded on police video. 18 arrest warrants nine suspects detained nine others still at large. The suspects are pakistanis and afghans. A key figure prosecutors say, this preacher arrested outside milan. It was a fundraising cell for al qaeda in pakistan investigators say, in direct contact with osama bin ladens inner circle. Italy has been following this group for years, recording thousands of their phone calls. One investigator said thats how that 2010 plot against the pope was finally uncovered. This is a series of guys who are involved from sometime back. In some ways were seeing a Historical Network being disrupted now. R italy days is on edge, and its not alone. Since the paris terror attacks in january, there have been dozens of police raids across europe. In france germany, belgium, Great Britain and italy. With fears of terrorism, anger and antiimmigration set are growing. And now in italy, theres more concern than ever with migrants arriving by the thousands every week on boats from libya, italian politicians warn that among them could be militants from sois which has repeatedly threatened to attack rome. Rep the vatican is the risk saying there was no specific of cause for harm. And a cardinal says pope francis is calm and serene about his security. There are new revelations about the cia drone strike that mistakenly killed two hostages one, an american while president obam reassessing the botched operation. Senior correspondent Chris Jansing has more. Rep preside got a standing ovation today from members of the Intelligence Community and a hawg from james clapper, one day after revealing that a cia drone strike in pakistan accidentl warre weinstein. We all bleed when we lose an american life. We all grieve when any innocent life is taken. Reporte nbc news has confirm thad when u. S. Drones struck an al qaeda compound they expected to hit four terrorists but found six bodies. It would be weeks before they could confirm that weinstein and an italian hostage were the two. The italian Prime Minister didnt mention a phone call from president obama. She called some of the contacts inconsistent and disappointing. There has been call for a hostage czar. I dont think were being as smart as we could be. Reporte its not an academic exercise. While the state department wont release exact numbers, its believed six americans are held oversea heaeeas overseas. Including kaitlyn who was pregnant. Including th matt. The white house is considering something simir to a hostage czar but wont change the policy of not negotiating with terrorists. A third y is used in these situations. And late today, sources told nbc news thats how officials were able to get medicine and warm clothes to weinstein during his captivity. Thank you. A somber 1 hundreth anniversary being marked around the world today, remembering what pope francis recently called the first genoci of the 20th century, the massacre of 1. 5 million armenians during turks in world war i. Observances here at home and elsewhere people marched through little armenia, waving signs and flags making sure the world never forgets. And Angelina Jolie brought her star power to call attention to the crisis in syria. She did not mince words about not doing enough for helping the millions displaced. We cannot look at syria and the evil that has arisen from the ashes of indecision and think this is not the lowest point in the worlds inability to present and defend the innocent. Jolie is a special envoy from the u. N. When asked about her briefing syrias ambassador is quoted as saying, shes beautiful. There is an alert tonight about a growing outbreak of bird flu ripping through the u. S. Poultry industry. Now in 16 states with minnesota the latest to declare a state of emergency. 7 million chickens and turkeys affected since march. And the government is scrambling to figure out how to stop it. Janet shamablien has our report. Reporter the most significant outbreak in 30 years. Minnesota the latest to declare a state of emergency. Tonigh more pr measures disineffecting ve and farms. Some of these chickens are sick. I know what a healthy bird looks like. And these looked a little bit sick. Reporter his farm now under quarantine and a complete lockdown at sun rise farms in iowa. One of the largest eggproducing farms. More than 1 of the egglaying hens in the u. S. Will be lost. Its a pretty significant number. Reporter the flu has fled to 16 states. Its called the biggest outbreak ever. Its spread through e droppings of birds. Maryann runs blue star ranch in texas. Among the poultry farmers across the country whose birds for now are healthy. The avian flu is definitely somethie concerned about. So we do our absolute best. Reporter the cdc says the risk is low, but the cost i skyrocketing o countries refuse poultry from states. Our food supply is safe. The fda says there has been no ineffected eggs or poultry sold to consumers. Janet shamablien nbc news houston. That erupting volcano exploding 9 miles high now disrupting air traffic. Streets covered in ash like snow. Incredible new images coming in. Then prepare your heart to soar. A terrific story of a my constipation and belly pain feel like a raging storm. Ive tried laxatives but my symptoms keep returning. My constipation feels like a heavy weight that keeps coming back. Vo linzess can help. Oncedaily linzess treats adults with ibs with constipation or chronic constipation. Linzess is thought to help calm painsensing nerves and accelerate bowel movements. Linzess helps you proactively manage your symptoms. Do not give linzess to children under 6, and it should not be given to children 6 to 17. It may harm them. Dont take linzess if you have a bowel blockage. Get immediate help if you develop unusual or severe stomach pain especially with bloody or black stools. The most common side effect is diarrhea, sometimes severe. If its severe stop taking linzess and call your doctor right away. 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There are new evacuation orders for those living around that volcano in chile now spilling ash nine miles into the air. Reporter the mighty blast causing most of the damaging chaos in southern chile are spewing toxic ash and gas into the air nine miles into the air for three state days. A tourist at a National Park captured the initial eruption. 10 miles from the volcano is now a no mans land. A tiny town choking in ash. 1500 people here forced to flee the dangerous air. No word on when they can come home. Chiles director of mining and activity says it could go on for weeks. With it visible from space, satellite image show smoke and debris drifting into ar argentina t towns are a chalky mass. The border between argentina and chile is shut down. So are airports. Terminals and runways an eerie ghost town. Some turning around midair to avoid the ash. American and delta suspending flights. Tony is stranded in costa rica. Theres debris all over the runway he says. Tonight the winds are again blowing more ash from the angry peak, a vibrant, colorful region now coated in soot and ash. Were back in a moment to tell you how much the airlines are saving this year and how little of it is you know, just because your bladder is changing it doesnt mean that you have to. With tena, let yourself go. Be the one with the crazy laugh. And keep being their favorite playmate. With tenas unique superabsorbent microbeads that lock in moisture and odor. Tena lets you be you. Our eyes they have a 200degree range of sight. Which is good for me. Hey . And bad for the barkley twins. Take care of your eyes with centrum silver women. Multivitamins with 60 more vitamin d. Our brains can control over 600 muscles at the same time. Heres what 90 of them can do. plays guitar take care of your brain with centrum silver women. Multivitamins for the most important parts of you. In Small Business you have to work hard, know your numbers, and stay focused. 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Science suggests when you have insomnia, the neurotransmitters in your wake system may be too strong, which may be preventing you from getting the sleep you need. Talk to your doctor about ways to manage your insomnia. The pafrnt company of nbc is dropping its bid for timewarner cable. The announcement comes after federal regulators announced that combining them would give them too much control over cable. Pepsi is dropping as per tame from diet pepsi, responding to falling sales of diet pepsi. And pepsi blame the declines on Public Perceptions that nutrasweet isnt safe. More than 100 studies show it is safe. Diet pepsi will now be sweetened with splenda, starting in august. Lower fuel costs have led to big savings for airlines, but not their customers. The four big carriers saved a combined 3. 4 billion in the first three months of 2015. But average fares of the First Quarter for American United and southwest only thank you for being a sailor, and my daddy. 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So you can breathe and sleep. Shut your mouth and sleep right. Breathe right. It may seem strange, but people really can love their laxative. Especially when its miralax. It hydrates, eases and softens to unblock your system naturally so you have peace of mind from start to finish. Love your laxative. Miralax. Our final story is about a little boy and his father. A little boy is proving the sky is the limit thanks to his dad. Amazing feeties of him flying have gone viral, inspiring so many people. Look right there. Reporter photographer Alan Lawrence takes hundreds of pictures of his kids. But one of them is not like the others. Because of all the lawrence children only will flies. Will has always wanted to fly, ever since he learned to roll over on his stomach. R so one day, dad made it happen. Sending the photos to friends and family a change from whens first and alan didnt share any pictures. When the doctor said he had down syndrome i didnt want people to see him and know that he had down syndrome. Reporte it took a wake up call from his wife to see beyond the diagnosis. I had to say, bud eye, we will deal with what comes our way. But right hes happy. Hes beautiful. Reporter and hes special, because wh hes eating breakfast or a midnight snack, on the farm with his friends his head in the clouds or his head in the game. Will can fly. And he can dunk. Mostly kids just look at the pictures. Theyll turn and look at m can he really fly . Repor its magic, mostly. Im simply holding him and go to photo shop and brush myself out. Repor on his blog thousands of parents who appreciate th perspective. Really trying to illustrate how he hasnt placed limits on our family. People with down syndrome have so much to offer the world. It might be a harder journey for him, but he can do anything he wants to do. He can fly. Reporter and when will flies, he lifts all of us with him. Alley jackson, paradise utah. Will and his pop giving us all a lift to end the week. Im lester holt. Thank you for watching and go Kim Kardashian speaks out about Bruce Jenners talltall. Did it spark a family feud . Now on extra. Kim kardashian today. Her first interview about bruces diane sawyer interview. I see things on online. Its all ridiculous and rumors. Mors. Will she be watching . Why bruce will watch it twice. Are you going to be okay . Plus theres nobody more loving than bruce. Our lost interviews packed with clues like this. I live two lives. Real life tragedy. Breaking new details on the suicide of a Everybody Loves raymond star. Why rays tv son took his own life and heartbroken romanos first words today. Dr. My killed off greys anatomy. Did an ugly behind the scenes war get him fired . A 10yearold dynamo at the voice. Its okay. Were good. Were good. Okay. Now on extra from Universal Studios hollywood, the entertainment capital of l. A