This is the cbs evening news with scott pelley. Pelley good evening. There was no escaping the war today, not for the palestinians who sought shelter in a United Nations school in the northern gaza strip. The school was hit by shells. Each side the israelis and the palestinians is blaming the other. Palestinian Officials Say at least 15 people were killed, dozens more were wounded. We have two reports tonight. First, Barry Petersen in gaza. Reporter there was only one question amid the chaos how does this kind of war makes sense . A child, who looked to be in shock. Two children brought in together. They looked bewildered. When we first saw sevenyearold shahhead, she seemed unconscious. But then a good sign opened her eyes. The hospital was overwhelmed. From everything weve seen, most of the casualties are children and women. Ibrahim shinbarry lost three cousins, his son wounded. No warning, he said. No warning. Eight days ago residents took shelter at the u. N. School as a safe haven. Some were still there after the attack. The u. N. Said it gave g. P. S. Coordinates of the school to hamas and the israelis to help arrange a humanitarian ceasefire for evacuation. Survivors said they were told to gather in the courtyard to leave. They did, and then suddenly, shells came down on us, he said. We ran in every direction children, women, everyone running. Tonight ende ended with one more question. They killed our son, she said. What do we do now . And from a grandfather to his grandson, with one more last farewell. Pelley barry, no one in authority is claiming to know what happened exactly, but the israelis are suggested it could have been hamas fire that hit the school. What is hamas saying . Reporter this is sort of inconsistent with what we were hearing from the survivors. The survivors talked nothing about any kind of firefight going on. It was peaceful. They were gathering in the courtyard when the shells came in. We asked hamas, and hamas said the eyewitnesses say it was israeli artillery and, says hamas, they speak the truth. Pelley Barry Petersen reporting from gaza again tonight. Barry, thank you. Hamas, the Palestinian Organization that controls gaza, has fired thousands of rockets into israel and vows to keep it up until israel lifts a sevenyearold blockade that has strangled commerce in the gaza strip. Don dahler is in israel for us tonight. Don, what are the israelis saying about the strike on the school . Reporter the Israeli Defense force toldis that there was fighting in the area, that there was a battle between an i. D. F. Unit and a hamas antitank unit that had been operating in the vicinity of that school and that what happened may have been caused by a hamas rocket. The israelis are not prepared to take responsibility for this tragedy. The primary focus for the i. D. F. Right now is to find and destroy tunnels, some of which, it says, extend all the way into israel. The Israeli Defense force says this tunnel is one of 31 discovered since invading gaza two weeks ago. Hamas has built a maze of interconnected tunnels, thought to number in the hundreds, underneath gaza to get around tight israeli security. Some are big enough to drive a truck through. Amos yadlin is a former head of Israeli Military intelligence. What does the tunnel system look like . They are like two or three entrances. There are rooms and bunkers to keep supplies, explosives. So its a whole system, very much like the streets of new york city, under the ground. Reporter to avoid detection, the tunnels are dug 60 feet beneath the surface. Hamas claim they are gazas economic lifeline, the only way to get muchneeded supplies and essentials. The i. D. F. Says the tunnels are used by militants to smuggle weapons and explosives and launch raids. Last sunday, the i. D. F said it spotted militants. How long have you lived here . Almost 50yearold. Micha ben hillel was asleep in his house when the gunfire woke him up. Israel can not allow this situation. No country consider allow such a situation when people can cross the border for the purpose of killing and murdering. Reporter even when discovered, tunnels are difficult to destroy. Theyre often hundreds of feet long, so just blowing up the openings doesnt mean they cant be used again. Scott, this latest incident brings the death toll in gaza to nearly 800, with 35 israelis having lost their lives, 32 of them soldiers. Pelley and israel is saying it will continue until the tunnels are gone. Don dahler, thank you very much. It was an act of nature that killed at least two people and injured 35 on virginias eastern shore. A tornado ripped through a campground this morning. Chip reid is in eastville, virginia. Reporter more than 1300 people were at the cherrystone Family Campground when the storm hit, many of them children. Witnesses say the sky turned black and started dumping hail the size of golf balls. There was a Tornado Warning for the area, but some say they found out only seconds in advance. One man said he didnt even have time to close the door to his camper. With countless trees down, it was too dangerous to stay. Everyone was evacuated to a local school. Thats where we met mark magill and his family, who barely escaped serious injury. The tree fell right on the car, and it hit her window, and glass went over her. She was bloody, a mess. Reporter theyre now okay, are as Megan Hostetter and her family who were almost crushed by a large tree that fell on her camper. Its van cass on the end so it started shaking really bad. We were holding on to the poles inside the canvas that pops it out on each end, and a tree came down to the backside of our camper. Reporter vayou taken your hands off your baby since this happened . No. Reporter the two people who were killed were a 38yearold couple from new jersey whose tent was crushed by a tree and, scott, their 13yearold son is in the hospital with lifethreatening injuries. Pelley chip, thank you very much. Tonight, arizona is reviewing its lethal injection procedure after the execution yesterday of a man convicted of two murders. It should have taken 10 minutes, but it dragged on for an hour and 57 minutes. It is the third time in the United States over of the last six months that a combination of drugs has failed to bring a swift and sure death. Ben tracy is looking into this. Reporter the flow of the lethal drug combination into Joseph Rudolph wood began at 1 52 p. M. 10 minutes later, witnesses say the 55yearold began gasping and his jaw dropped. Michael kiefer of the Arizona Republic newspaper was a witness. Many of described it as looking like a fish out of water Mouth Opening suddenly. You could see his chest rising, his stomach contracting and it went on and on. Reporter kiefer said wood gasped 600 times. An hour into the execution, his lawyers filed an emergency appeal to stop it. He has been gasping for more than an hour they wrote. He is still alive. Wood was finally pronounced dead at 3 49. Prison Officials Say he was always desay thed and never in pain. Everybody is worried about did he suffer . Who really suffered was my dad and my sister when they were killed. Reporter jeanie browns father and sister were shot by wood in 1989. Richard brown says he watched his sisterinlaw die. You know, this man, i mean, conducted a horrifying murder, and you guys are going, oh, lets worry about the drug and how he is affected. Why department we give him a bullet . Why didnt we give him some drano . Reporter arizona used a new mix of two drugs that had been used in an execution once before, in ohio where Dennis Maguire gasped for nearly 30 minutes before he died. The drug had been used for years in lethal injections, but the supply was cut after Death Penalty opponents convinced the european manufacturer to stop selling it to u. S. Prisons. Dale baish is joseph woods attorney. I saw a man struggling to breathe for an hour and 40 minutes. This is experimenting on human beings. Reporter here at the Arizona State capital, Arizona Governor jan brewer is calling for a full review of the states execution process. Scott, there are currently 120 inmates on arizonas death row but no executions are scheduled. Pelley ben trace nephoenix for us tonight, thank you, ben. Now, woods lawyers say his execution is a violation of the eighth amendment of the constitution, which prohibits cruel and unusual punishment. Were going to turn now to our chief legal correspondent, jan crawford. Jan, where is the Supreme Court on lethal injection . Well, scott, there is no suggestion that the Supreme Court is going to declare the Death Penalty unconstitutional, but i think the justices may be forced to take a look at the various methods that the states are using for lethalnjections. Now, the last time that the court looked at lethal injections was back in 2008 when if upheld kentuckys drug formula as constitutional. Since then, the court has given states a lot of leeway to come up with new drug protocols and has flatley refused to get involved in any of thooes these cases. But as these problems continue to grow, were starting to see even Lower Court Judges urging the justices to step back in and give clearer guidance. And, scott, on monday, one Prominent Appeals Court judge went even further, urging states to drop lethal injections entirely and return to the firing squad. Pelley jan crawford, chief legal correspondent, jan, thank you. No survivors today at the scene of yet another jetliner crash. The wreckage of the airalgee, md83 was found in mali, west africa. It burkina faso this morning with 116 people on board. No word on the cause. Today, two more military planes flew from ukraine to the netherlands with victims of the Malaysia Airlines disaster. 74 coffins were loaded into hearses. The remains are being taken to a military barracks where hundreds of forensic scientists from around the world will try to identify the remains. 298 people were killed when the plane was shot down over ukraine nearly one week ago. Nearly 100 are missing. Mark phillips is at the crash site. Reporter the red cross is now trying to restart the effort to find the missing victims on the crash site. Oran finnigan of red cross Forensic Services we would like to see that to ensure the remains are collected in a dignified manner as soon as possible. Reporter but speed and dignity have not been hallmarks of the body retrieval effort here, and the red cross found themselves alone. The local workers, who days ago had retrieved bodies under the guns of the rebel militias who control the site, are long gone. The only people actually working here are the trio of malaysian investigators now joined by an australian, and remarkably, theyre still discovering wreckage. Deep in the woods and about a mile from the main crash site the inspectors came across this huge piece of fuselage that they hadnt seen before, a week after the crash. This whole area needs a thorough search that it isnt getting yet. A Large International investigation team,ncluding americans thats been assembled to come nhasnt yet. Its not safe, thigh say. Michael borkiurkiw of the european monitoring group, the o. S. C. E. the malaysians have told us that they felt they had good access and they felt safe. Reporter should the team be here . Should the International Team be here . I well, ill answer it this way is that there are people far better placed than we are to do this type of work. Reporter and, scott, the dutch now say theyll send a contingent of 40 military policemen, unarmed, to the site to help look for the missing victims and their belongings. Pelley Mark Phillips reporting from eastern ukraine, mark, thank you very much. Why do so many young people risk it all to sneak into the United States . We went to Central America to find poin out. And this photo has gone viral. Youll see why when the cbs evening news continues. If you suffer from constipation, you will likely also suffer from gas. Introducing new dulcogas, which starts working to eliminate gas bubbles in minutes for effective relief. Dulcogas, from the makers of dulcolax nothing relieves gas faster. Why suffer more than you have to . You can do something different. Because the landscofape options has changed. Brisdelle is the only fda approved, nonhormonal option proven to reduce moderate to severe hot flashes during menopause. And the bedtime dose provides 24hour relief. Brisdelle is not for everyone. Call your doctor if you have changes in mood or behavior, thoughts of suicide, or a high fever, stiff muscles or confusion, signs of a possible lifethreatening condition. Abnormal bleeding, bone fractures, restlessness, vision problems, and impaired judgment and motor skills may occur. Dont take brisdelle if you are pregnant, taking maois, thioridazine, pimozide, or are allergic to paroxetine. Tell your doctor about all your medicines like tamoxifen, triptans, or paroxetine. Side effects include nausea, vomiting, tiredness, and headache. Change is in the air. Its time to talk to your doctor about the only fda approved, nonhormonal option. Brisdelle. Pelley today, californias attorney general said she is lining up lawyers to represent children from Central America at immigration hearings. Since october, more than 57,0000 children have been caught crossing the isborder. Most are held in detention facilities until their cases can be heard. Every day, more of these children attempt this dangerous journey, and to better understand why we sunda sent mal bojorquez to el salvadors capital. Reporter more than 15 buses arrive every week carrying dozens of young people, some as young as one year old. They fled for the u. S. But were caught in mexico and deported back to this government processing center. We cant show you their faces for security reasons. This 15yearold traveled with her baby. What are you looking for in the United States . A better life. You cant have a good life here, she said. There are too many problems, too much crime. Her parents left el salvador 10 years ago for the u. S. Shes been trying to join them ever since. This 16yearold told us she wanted a Better Future for her son. It was one of the toughest decisions of my life, she said. But im afraid for my son because of the violence and gangs here so i have to try. O this day, they were among 60 registered at the center. Here, theyre asked why they left, warned about the riskes of trying again, and then released. When young people return to these neighborhoods, there is no safety net, and most have no faith their government is working to protect them. They are afraid of organized crime. They are afraid of gangs. Reporter Elizabeth Kennedy is a fulbright scholar who has interviewed over 500 salvadoran children. Its very common for children here to have already seen a murder. Its common for children to have already lost a family member. Thats something no one should have to live with because youre not really living your life if every moment youre afraid youre going to die. Reporter el salvador has the worlds fourth highest murder rate, fueled by powerful gangs and a growing drug trade. Those sent back from the u. S. Are prime targets. How many of the children that you interview who are sent back have plans to try the journey again . Over half. Reporter so you dont think the administration coming out and saying you cant stay here were going to deport you, will actually decrease the flow . I do not. Until root causes are addressed, until people can feel safe at home, until they are not afraid for their lives, people are going to keep migrating because it is a human instinct to want to survive. Reporter a tough proposition once they return to life outside of these gates. Manuel bojorquez, cbs news, san salvador, el salvador. Pelley and well be right back. Anything but. So whether its taste inspired by the freshness of the mediterranean. Or the smoky spice of the southwest. Or bold, adventurous thai flavors. You always get flavor thats anything but flat. And always with chicken raised without antibiotics. New flatbread sandwiches from panera. Each 360 calories or less. Try one today. Then boom. What happened . Stress, fun, bad habits kids, now what . 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Of course, its the National Weather system that tells us what the temperature is but who tells the weather system. Anthony mason met the weatherman. Reporter across the country, 8500 volunteer observers record the nations weather every day, but none has been doing it longer than 101yearold richard hendrickson. Right now, it is exactly 80. Reporter for 84 years now, hendrick son hab monitoring the highs and lows from the thermometer shelter in his backyard in bridgehampton, new york. Is this pretty much the way its always been . Oh, yeah. Reporter real simple. Just like that. Youre going to show age a little bit here in the joints. Reporter we all do. Like we all get. Reporter he also checks