Stormed parliament. Cell phone video shows lawmakers escaping in cars. The crowd, backed by popular shiite cleric alsadir demanded that the Prime Minister overhaul the cabinet part of a corrupt political system put in place by the u. S. After the invasion in 2003. This weekends Security Breach came less than 48 hours after Vice President joe biden visited the iraqi capitalen a show of support for the man who the u. S. Regard as stable partner in the war on isis. But there is concern isis is feeding off this political instability. This afternoon the Group Carried out twin car bombings that rocked the southern iraqi city more than 30 people were killed. The latest in a recent wave of attacks. The cleanup continues following a Train Derailment and Chemical Spill in washington, d. C. This morning. A Freight Train went off the tracks flipping 14 cars on their side. Hydroxide used in household cleaning products. And no Evacuations Ordered and the spill has been contained. The cbs overnight news will be right back. Last nights white house Correspondents Dinner president obama made his final appearance while in office. And jamie yuccas has details. The end of the republic has never looked better. Reporter this year marked president Barack Obamas last correspondents bash which may have been his finest performance. I know i was a little late tonight. I was running on cpt which stands for jokes that white people should not make. Mr. Obama known for his well placed zingers made the job of comedian Larry Wilmore even harder. I have to admit it is not easy to follow the president , man, you got some jokes, mr. President. President ial candidates, comparing Hillary Clinton to an aunt who doesnt understand facebook. Dear america, did you get my poke . He called 74yearold Bernie Sanders the bright new face of the democratic party. Bernie, you look like a million bucks, or to put it in terms you will understand, you look like 37,000 donations of 27 each. 20 minutes in he pretended to be wrapping up. Im just kidding. You know i have got to talk about trump. Who was not in the room. I am a little hurt that he is not here tonight. Once he got started the punch lines kept coming. There is one area where donalds experience could be invaluable, and thats in closing guantanamo. Because trump knows a thing or two about running Waterfront Properties into the ground. The president s last laugh came as just two words. Obama out. The end of an era. Jayu the first familys first daughter decided where she is going to college. Harvard will be malia obamas new home. Not quite yet though, she is taking a socalled gap year. A year off before she starts at harvard in 2017. The first family made the announcement on National College decision day. The deadline for enrollment deposits. For those taking College Loans the government rolled out a new payment plan. Cbs News Business analyst jill slessinger is here. Jill, this is called the pay back playbook. Theyre doing this because there is a problem. Absolutely. We know that Student Loan Debt has ballooned, gone up two times over the last ten years, 1. 3 trillion in outstanding debt. The bigger problem its that about one in four students is actually in default or delinquent on the loan. And the government was really wondering why werent more people taking advantage of various repayment options that existed since 2009. Were problems with the loan servicers not giving enough information to student borrowers. This presents options for pay back . Absolutely. So what it does it lays out three specific ways students can pay back their loans. They do it in plain english, no fine print. Let me give you an example of this. Say that your current plan is a loan for ten years. You have 271 a month payment. You say what would happen if i had an accelerated payment that started low and went up to a larger number at the end. Start at 152 a month. Then a plan just based on your income. That would be the lowest payment occur over 20 years. You have three plans. You figure out which one is the best one for you. None of this is set in stone yet . Whats the next step . Right now we will see Public Comment on this. But the government is really wanting to see this plan implemented. As soon as possible. And, frankly, theyre very mortgage crisis if borrowers dont have enough information, theyre going to be behind the 8 ball. Again the Student Loan Debt problem is a huge issue. And this is one way to help address it. Jill, thanks very much. Up next here, circus elephants pack their trunks for retirements. New images of a picture perfect princess. The cbs overnight news will be right back. Unless you have allergies. Then your eyes may see it differently. 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Tonight marks the final performance for elephants at the ringling brothers Barnum Bailey circus. After years of pressure for Animal Rights groups. Demarco morgan reports on this. Ladies and gentlemen reporter the greatest show on earth, is letting go of its biggest performers. 11 asian elephants performing their last head stands and taking their final bows. Here we go. Reporter ending a 200 year spectacle that enthralled fans and enraged animal activists for years. Kenneth feld chairman of the Parent Company that owns ringling brothers. A bittersweet decision no question about that. But it is the best thing. And we felt this was the right time to do it. Reporter the right time to retire these enormous animals with their tiaras, the subject of thousands of you tube videos from activists citing animal abuse. Actor alec baldwin. Even jumped into the fray. Hard to believe any one would have to be dragged kicking and screaming into show business. Ringling brothers thats exactly what happens. Reporter all part of a huge shift in u. S. Attitudes towards animal entertainment. Sea World Entertainment phasing out killer whale shows the at its amusement parks last month. These elephants will retire to this 200 acre Conservation Center in florida run by the owner of ringling brothers. More than a dozen circuses tour with elephants. But none as widely or with as much fanfare. o say as ringling brothers. It is the end of an era that should have ended a long time ago. Reporter eleanor mobigot is with Humane Society of new york. This is so unnatural. Shouldnt be subject to abuse. People the more they know that will enjoy the circus more when theyre going to something humane and hasnt caused horrible suffering. Controversy will likely not end here. Jeff, ringli continue to use other animals including lions, tigers and horses in their animal acts. Demarco, thank you. 33 rescued lions are finally paws down at their new home in south africa. The animals had been abused at circuses in peru and columbia before a rescue organization set up an air lift and flew them to a Big Cat Sanctuary north of johannesburg. Up next, tell Elaina Nichols she cant do something. And she will. She is the First American woman to win gold in the summer and winter paralympics. Her name is Elaina Nichols a champion in wheelchair basketball and alpine skiing. Now before the rio games this summer, nichols picked up two new sports. And 60 minutes sports paid her a visit. It is called wave skiing. Which nichols just picked up two years ago. She says it gives her freedom outside her wheelchair. On this day, she had her longest ride ever. By the time i am done with the two hour surf session i am completely exhausted. Reporter Elaina Nichols is constantly in motion. If i dont push up that hill, i dont get my heart rate going. I dont sweat. Dont breathe hard. Thats whats important to me. Reporter she spends hours in the gym strengthening her upper body. Often pulling hundreds of pounds of weights. She started training a year and a half ago in sprint kayaking. Which will be a new sport at rio games in september. Sport. What happens for an ablebodied kayaker is they basically do what is called a reach. You reach as far out as you possibly can. You catch the water with your kayak. Then an ablebodied athlete will push off their leg as they pull the water past them. And soap for me, i have got my legs, locked completely straight in here. So i can actually catch the water and transfer my energy into the boat. With my core strength. Her coaches told us Elaina Nichols has an uncanny ability to learn quickly. Able to reach an expert level when others are still figuring out the basics. Tell me i cant do something. And i will. Nichols has overcome enormous personal challenges along the way. You can see the full report on 60 minutes sports tuesday night on showtime. Princess charlotte celebrating her first birthday tomorrow. Kensington palace release nude photos here they are taken by her mother. Some of the candid of the from College Student to army soldier. Then tragedy struck. My world turned upside down being told i would never walk again. Now im excited about my life, thanks to paralyzed veterans of america. With their support and Adaptive Sports programs, my fire is lit again. For veterans with spinal cord injury or disease, pva is our partner for life, assisting as our needs and challenges change. Thanks to pva, my life is back on course. To learn more, visit pva dot org. We close with an update on a story cbs news has been following over a decade. Partnership between a community in crisis and a nun who devoted her life to helping. Don dahler says the bond has only grown stronger. These arizona students at st. Peter Mission School in the Gila River Indian Community are running for their lives. Adult on set diabetes once known as a disease of the elderly is affecting children here as young as 4. Knowing capacity our people have for diabetes we start our day out with running. Sister mary martha carpenter is the schools principal. We dont teach subjects. We teach children. We are giving them the skills, lifelong healthy habits. Reporter some of the 230 boys and girls enrolled in the k through 8 school are already clinically obese. A few tipping the scale at nearly 300 pounds. For thousands of years the pima indians lived off the land, farming this desert. After the gila river was damed in 1930 to provide water to nearby phoenix, their farms dried up. 60 minutes visited the community in 2003. It is rare to see a physically fit person here. And according to National Institutes of health, theyre still among the most obese americans. Teach you something. Reporter back then sister martha had taken on the federal government. And won. She was granted permission to modify the Federal School lunch guidelines for her students. Todays lunches are healthier. Low on carbohydrates. Higher on protein. Fresh fruit. And fresh vegetables. Reporter the results are visible and invisible. This year we may have several children who are prediabetic. We dont have any children who have the dreaded disease. Reporter after 33 years of fighting for these kids, this battle has become personal. When i see their smilie faces and their running feet, just makes my day. Reporter with her help, these kids now have a running start. On the rest of their lives. Don dahler, cbs news, new york. That is the cbs overnight news for this monday morning. For some of youve the news continues. For others check back later for the morning news and cbs this morning. From the Broadcast Center in new york city, im jeff glor. Welcome to the cbs overnight news. Im jeff glor. Campaign 2016 runs through indiana tomorrow. Donald trump has 80 of the total delegates needed to win the nomination. A resounding victory in indiana would all but seal the nomination. John kasich stopped campaigning in indiana to give ted cruz a better shot at taking delegates from trump. Cruz spoke with John Dickerson on face the nation. Donald trump is attempting to perpetuate one of the greatest frauds in the history of modern elections which is he is trying to convince people he is some sort of outsider. Donald is the essence of the washington insider. He has been enmeshed in the corruption in washington. You know, john one thing that illustrateat out of his way to attack me to call me the devil and then he praised two people, john boehner praised Hillary Clinton and donald trump. He said donald was his friend, his golfing and texting buddy. If you think john boehner is the kind of leader you want in the Republican Party then donald trump is your candidate. If you think nancy pelosi and harry reid are the kind of leaders you want, donald trump is your candidate he contributed heavily to john boehner, harry reid, nancy pelosi, Hillary Clinton. And in fact, you know, i saw boehners comments. I kind of wondered if boehner was auditioning to be Donald TrumpsVice President. A trumpboehner ticket would say the Washington Cartel and all its force, one has been funding the cartel, the other has been giving into democrats for years which is why boehner lost his speakership. We need instead some one fighting for the people and not for washington. But your theory of how you will get the nomination relies on you going to an open convention and overthrowing the delegates, delegate lead donald trump has. In order for that to happen, you cant do that what the help of the washington establishment that you have just been talking about. John, here is where we are. Nobody is going to get to 1237 before cleveland, im not going to. Neither is donald trump. We are going to go to a contested convention. When we arrive in cleveland, i will half a bunch of delegates. Donald will have a bunch of delegates. It is going to be a battle to see who can earn the support of a majority of the delegates elected by the people. Ask you this, senator. There is no question that you are the establishments preferred candidate in that open convention competition. You dont deny that do you . Of course, there is a question. John boehner the essence of the establishment called me lucifer in the flesh. He said donald trump its his texting, golfing buddy. Listen, the Washington Cartel, lobbyists. Donald Trumps Campaign is run by washington lobbyists. Wampaign manager is a 40 year his lobbyist Campaign Manager went and told heads of the rnc that donald is just playing a role he doesnt believe any of this. He is just staying what he thinks the voters want to hear. He will be somebody totally different. John, you have known me a little while. I am the same person. Yesterday, today, tomorrow as president i am going to do the exact same things i promised to do. We will repeal obama care. Pass a flat tax. Businesses. Bring back jobs, economic growth. Manufacturing jobs back to the country. Donald changes as the wind blows. The only thing donald is interested in, donald. Whatever makes him rich. We have seen the bipartisan corruption of Hillary Clinton and donald trump and john boehner, who sell out their principles. I think the American People want principled leaders who actually have a core set of beliefs. If in cleveland your scenario were to go forward, the person who has millions more votes. That wont he will go to the convention, donald trump will, with millions more human beings, regular folks supporting him. You are hoping to overthrow that with more delegates. In a situation delegates over people wont that lady to riots . No it wont. Although donald may do everything he can to encourage riots. Overthrow is such a loaded spin word. As to bring nothing but chuckles. I can tell you the last contested convention we had, 1976, Ronald Reagan had 1 million more votes than gerald ford. Gerald ford got the votes of the majority of the delegates. If you our very first candidate for president. Abraham lincoln came into a contested convention. Second in the balloting. On the third ballot he within a majority. The test its to win a majority. And donald cannot win a majorities. Majorities matter. On the democratic side. Senator Bernie Sanders look