Good evening. It is called the centers for Disease Control for a reason. Its the one place that deals with the worst stuff on the planet. The most virulent, fatal and feared substances, bacteria and viruses, on planet earth. They must be kept somewhere ideally contained and under lock and key. Right now, there are big problems at the cdc over just that. The control and handling of dangerous substances. The recent incident involving anthrax made news, then today we learned about more. And the head of the cdc spoke out in anger and took action today. Its where we begin on this friday night with our chief medical editor dr. Nancy snyderman. Reporter the cdc responsible for tracking every disease on the planet, including anthrax is reeling today after a series of embarrassing mistakes. Im just astonished that this could have happened here. Im upset. Im angry over it. Im working around the clock to resolve it. Reporter today the cdc acknowledged a sample of animal influenza sent to a lab in may was contaminated with the deadly h5n1 bird flu and it wasnt reported right away. As to why it took six weeks for that to be made apparent to us, i can think of no valid explanation. Reporter h5n1 bird flu so infectious that millions of birds in asia have been slaughtered to keep it from spreading. Another mistake last month 86 cdc employees were potentially exposed to anthrax after samples were mishandled. Anthrax is a bioterrorism agent, used as a weapon to kill five americans in 2001. Adding to the problem, the six vials containing the smallpox virus in a storage room at the National Institute of health. Today it was revealed that two of them contained live virus, capable of infecting people. It should have been destroyed 40 years ago. In response to the incidents the cdc today shut down the flu and anthrax labs and stopped shipping any infectious agents from the highest security facilities. This should be a wakeup call that this could have happened in any number of labs around the world and tonight there shouldnt be a lab director in the world sleeping easily. Reporter no one s feed in any of the incidents, but the pact that the public could have been sickened is a black eye for the most trusted Public Health institution in the world. Theres no doubt that people will be held accountable and i expect heads will roll. Certainly got our attention today. Nancy snyderman, thank you as always. Overseas tonight, in the middle east, it goes on. Something just shy of war, but its constant. No letup in the air attacks being lodged by israel and hamas. The death toll now topping 100 in gaza. Most of them civilians. Israeli Prime MinisterBenjamin Netanyahu said today he wont be swayed by International Pressure as israeli tanks continue to gather on the border. Our veteran middle east correspondent Martin Fletcher is in tel aviv for us tonight. Good evening. Reporter brian, israel says its destroyed 2,000 rockets in gaza, but there are many more targets to hit. And the army says its all set to invade gaza, all the army needs now is the government order. Gazas death toll passed 100 today. Palestinians killed in the four days. But israel says its trying to limit the civilian casualties. This is how. They call it the knock on the roof. A neighbor shouts warning, warning. Before israeli attacks a civilian home, it warns them by dropping a bomb with no explosives and also sends Text Messages and makes phone calls to the residents. One minute after the warning, israel says its all behind the controlled centers and the rocket launchers among civilians. Rockets like these, islamic militants have fired 660 rockets at israel in four days. The first to do any real damage hit today. A gas station in the southern city. The impact caught by the cctv cameras. Eight wounded, one seriously. And Prime Minister netanyahu said today, no International Pressure will stop us acting with all our power. About the Ground Invasion he said, we are weighing every opportunity. And a battery was deployed from the factory today. The antirocket system has knocked out almost all of the palestinian rockets threatening cities. Its enabled tel aviv residents the main targets, to take it all in stride. My parents are more worried than i am. Reporter but this is tel aviv tonight. Today hamas warned Foreign Airlines not to fly into tel aviv. They said its also a military airport, but no rockets have fallen nearby and theres been no change in the routine. Martin fletcher, as we enter yet another day, thanks. Back to a community outside houston still reeling from the awful tragedy. There was a dramatic moment in court today as we learn more now about a man charged with going on a deadly rampage. We have an update tonight from nbcs miguel almaguer. Reporter facing a judge for the first time today, ronald lee haskells knees buckled as he heard the evidence against him. Charged with capital murder, he collapsed in court. Maybe reality is finally setting in. This is not television. This is not fiction. He is facing the consequence. Reporter police say haskell was looking for his exwife when he broke into his sisterinlaws home, shooting five innocent children and their parents. Stephen and katie stay, execution style in the same room. 15yearold cassidy, the lone survivor, called 911. Cassidy, shes a hero. She put her hands over her head. And she was shot in the side of her head. Reporter after a slow speed pursuit, haskell surrendered. Police believe he was enroute to kill his exwifes parents. The focus of my defense with regard to mr. Haskell is going to be on his mental condition. Reporter haskell has a history of domestic violence. In 2008, a guilty plea for assaulting his then wife. Just last week, haskells mother filed a restraining order after she says he choked her until she passed out. Days later, haskell showed up in texas. The truth is, a human being sometimes you have no idea what theyll do and when theyll do it. Reporter tonight, just outside houston, there are no answers. Only sorrow and pain. If convicted the suspect could face the Death Penalty here in texas. As to the 15yearold girl, incredibly shes been released from the hospital. Brian . Miguel almaguer, outside Harris County courthouse, thanks. Authorities are on alert in Washington State where five wildfires are burning. One nearly 30 square miles in all. Temperatures topping 100 degrees on the way this weekend, making for a difficult fight. Hundreds of firefighters are battling the flames in the eastern part of the state. Some folks there have been warned to be ready to evacuate now at a moments notice. As you might have heard, this was a big day in cleveland. They are getting lebron james back. Four years ago, lured by the white sands of south beach, the green that was being offered by the miami heat and his quest for gold championship rings, lebron broke hearts in cleveland and he left and he went to find all of that in florida. Now four years later, hes headed back to the place that brung him to the dance and hes going back to stay so this was a happy day in cleveland. Thats where nbcs jenna wolfe is for us tonight. Good evening. Reporter good evening to you, brian. Yeah, lebron james admits he was young and maybe even a little reckless with the hearts of cleveland fans the first time around. But now hes back to make things right after the city of cleveland said thats more than enough. Theyre the three words that the city of cleveland has been waiting to hear for four years im coming home. And with those words came these words. One of the greatest moments in cleveland. Are you crying . I mean its fantastic. Reporter there wasnt a big splashy announcement or a press conference like when he left cleveland heartbroken four years ago. Instead, an essay. Rather heart felt to his fans explaining why he was coming home and admitting his leaving caused hard feelings. My relationship with northeast ohio is bigger than basketball. I didnt realize that four years ago. I do now. The suspense about the next move kept the city on edge. People swarming his house with police on hand. Now this whole thing almost came crashing down when the owl picked miami as the place lebron was going to end up. I dont know who her sources are. But like the last three days the whole thing caused a lot of confusion. I hear you. A lot. This whole saga documented everywhere. From tv to tshirts. The lying king has been forgiven, but this news isnt just good for basketball fans. Lebron coming back means good for business anywhere. Not just around the stadium, right . No question that the city is definitely going to be impacted in a positive way. Reporter speculation about lebrons return, ticket prices for the cavs could suddenly become the most expensive in the entire league. Upwards of 200. And in return, lebron writes hes on a mission to bring glory back to cleveland. Our city hasnt had that feeling in a long, long, long time. You have done a wonderful thing for cleveland. Reporter but clevelands gain is now miamis pain. Lebrons image already defaced. Its bittersweet because he give he gave us four great years. We wont burn jersey, i promise. Lbj reporter how quickly cleveland has forgotten and forgiven. On to the current salary cap rules, lebron james will make under 21 million. The Cleveland Cavaliers have even moved a couple of players to make room for lebron. It was a classic case of whatever it takes. If you listen carefully you can hear celebrations throughout this city tonight. Lebron james is back in town. Thats right. Jenna wolfe on the eve of a very big weekend in the city of cleveland. Thanks. Another story certainly got a lot of attention in some parts today. The National WeatherService Warning that a summer version of the polar vortex was about to make a return visit next week throwing a wrench in a lot of Family Vacation plans. Temperatures are expected to drop from the 80s and 90s, the stuff of july into the 50s and 60s in some areas of the country. We get our report tonight from nbcs tom costello. Reporter think back five to six months ago when many of us developed a deep hatred for a weather phenomenon we had never heard of before. The polar vortex allows it to make its way down to the south. I dont think in my years of standing here i have been this cold. Now that were in the next deep freeze and the next polar vortex for better or for worse the thaw could be a long way off. Reporter that was in february. Today, minneapolis hit 81 degrees. On monday theyll be lucky to get out of the 50s. This is typically the warmest time of the summer. This is a shock to the system, especially for those in the Northern Plains and the upper midwest where temperatures will be about 30 degrees below average for this time of year. Reporter experts say that massive typhoon in japan is the cause, forcing the jet stream to take a big dip to the south. On thursday the weather as much as was calling it the return of the polar vortex. But meteorologists say only a piece of the polar vortex will make it feel like fall football weather next week. Its a little fragment of cold air hiding up above the arctic circle. Thats coming down, july style. Again, its not january. July. That will bring some record lows our way. Reporter hit hard last winter, chicago. It doesnt feel like summer is totally gotten here yet. Reporter now at the licketysplit ice cream shop theyre preparing for the next cold snap. When its 80s it drops down to 60, we see less people. Probably like 65. Thats cold for the summer. But not a polar vortex. Reporter the good news, it will only be a chilly swim for a few days in many cities. The bad news . The real start to autumn is two months away. Tom costello, bethesda, maryland. You had to add that at the end. Still ahead on a friday evening, a Police Officer tries to sound the alarm by doing something very powerful on camera. To warn against a big summer danger. And later, the changing face of a young actor growing up on film like we have never seen before. Film like we have never seen before. Listen up. Im reworking the menu. Veggies youre cool. Mayo, corn dogs. You are so out of here ahh. The complete balanced nutrition of great tasting ensure. 24 vitamins and minerals. 9 grams of protein. With 30 less sugars than before. Ensure, your 1 dr. Recommended brand now introduces ensure active. Muscle health. Clear protein drink and high protein. Targeted nutrition to feed your active life. Ensure. Take life in. This is mike. 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Reporter after 30 minutes, he had to stop. My body is telling me to get out. Its pretty brutal. Definitely an awareness even for myself. Reporter heat stroke is the second leading cause of nontraffic fatalities among children in the u. S. So far this year, 16 children have died. A recent survey of 1,000 parents found that nearly 7 in 10 know about the dangers, but said they would leave their own children alone in a car. 14 of parents reported they have actually done it. Experts say most people think a tragedy wont happen to them. And that is the worst mistake any person can ever make. Because if you think it cant happen to you, then you wont put the protections in place that will prevent it from happening. Reporter right now, there are no government approved technologies on the market to alert when kids are left in the car. Experts say parents and caregivers need to be the first line of defense. Anyone watching this can potentially save a childs life if they see a child left alone in a car. Reporter in fact, tennessee just passed a law to protect passersby who break a car window if they think a childs in danger. It was passersby in new mexico who rescued a 5yearold girl locked in a hot pickup truck for more than an hour. Sweating, unsure, very scared. Reporter a child saved and a reminder of an avoidable tragedy. Rehema ellis, nbc news, los angeles. Well take a break and be back in a moment with the greatest show on earth. Coming this weekend. End. Ork thrt to bake fresh bread from fresh dough in every bakerycafe. Because it tastes better that way. And it makes all of our sandwiches. Soups. And Everything Else it touches taste better too. Then, at the end of every day, we donate everything we have left to people in need. So were out of bread. And we stay up all night. And do it all over again. Panera bread. A body at rest tends to stay at rest. Cs. While a body in motion tends to stay in motion. Staying active can actually ease arthritis symptoms. But if you have arthritis, staying active can be difficult. Prescription celebrex can help relieve arthritis pain so your body can stay in motion. Because just one 200mg celebrex a day can provide 24 hour relief for many with arthritis pain and inflammation. Plus, in clinical studies, celebrex is proven to improve daily physical function so moving is easier. Celebrex can be taken with or without food. And its not a narcotic. You and your doctor should balance the benefits with the risks. All prescription nsaids, like celebrex, ibuprofen, naproxen and meloxicam have the same cardiovascular warning. They all may increase the chance of heart attack or stroke, which can lead to death. This chance increases if you have Heart Disease or risk factors such as high Blood Pressure or when nsaids are taken for long periods. 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Prilosec otc. One pill each morning. 24 hours. Zero heartburn. The state of tennessee has lost two titans in just the last 16 days. First came the death of former senator howard baker. Now today the death of John Seigenthaler. While nbc viewers came to know his son of the same name, john sr. Is being remembered as a legend in the south and a champion of journalism and the first amendment. He was the long time editor of the nashville tennessean who showed such great courage in the civil rights struggle. He twice worked for bobby kennedy. He was an air force veteran and effortless writer with the restless mind. He loved the newspaper business and later had a hand in shaping usa today. He loved tennessee right back and John Seigenthaler was 86 years old. On the eve of the world cup finals it has occurred to several Million People around the world these two teams playing for all of it represent the home nations of two living current and former popes