Woodruff a jolt to the mind. Scientists use weak electrical current to boost brain activity and amp up human performance. My tdcs session lasted 20 minutes. All i felt was a little bit of tingling in my scalp. It was like a jolt of caffeine minus the tense feeling. And for several hours afterwards, i felt extremely clear headed. Woodruff and. My mother and i just sang que sera, sera three times. God bless you doris day for giving us such a great theme song. Woodruff the remarkable life of a mother. Nprs scott simon chronicles the lessons of a lifetime on twitter and in his new memoir, unforgettable. Those are some of the stories were covering on tonights pbs newshour. Major funding for the pbs newshour has been provided by it doesnt matter what kind of weather. It doesnt matter what time of day or night. When mother natures done her worst, the only thing that matters to us, is keeping the lights on for you. Were the men and women of the International Brotherhood of electrical workers. 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Woodruff the Nuclear Talks between iran and six world powers went down to the deadline today. But with hours to go, the state department announced the meetings in lausanne, switzerland, are being extended at least a day. We get more from Indira Lakshmanan of Bloomberg News whos in lausanne. Hello again. So its midnight there. This is when it was all supposed to be wrapped up. Whats going on . Yes i was supposed to be on a plane by now, but obviously youre seeing me, so apparently not. Were a few minutes past the selfimposed deadline the two sides set for themselves last november when they missed the last deadline so the idea was they were meant to come to this framework understanding tonightment now clearly the two sides have made enough progress that they feel its worth going into the next day as theyve told us, but not surprisingly at a time like, this you have public posturing and messaging through the media. We had one delegation tell us that iran had been given a makeorbreak dawn headline, that it was now or never. Then the u. S. Denied that. Iran denied that. So, you know each of these different six powers in iran are trying to send their own messages to try to get something done that they can go home and be happy with. Woodruff is it possible to sort out among all these stories that are being put out there to the press which ones are reliable . I think were not going to know until we know until they give us a joint declaration or until they declare failure, but what we had been hearing earlier in the day is it was very likely the two sides would come up with major points of agreement, not on everything, thats for sure. They still had problems over irans enrichment capacity, over research and development, and over sanctions relief and what shape that was going the take but they were going to try to come up with major points of agreement, come up with a joint declaration and then have bullet points. That would still give them three more months to come up with a detailed technical accord. But, you know, i think at this point theyre still trying to get there. They need to be able to have agreed on enough of the main points that secretary kerry can take it home to washington, sell it on capitol hill and the minister from iran can take it home and sell it to the Supreme Leader and president rouhani. Woodruff weve been told the iranians have been focused on a june deadline. Is that having an impact on whats taking place . It may be. The Supreme LeaderAyatollah Khamenei says he doesnt want a twostep final deal. He wants one step. The iranians have been pressuring the americans saying we want a long, written accord, the final one in june. We dont want to have to write something out now but i dont think thats whats holding it up at this point. I think whats holding it up is there are some really difficult issues. Thats why there has been a 12year standoff between the International Community and iran over this disputed nuclear program, which iran denies is seeking military applications, that the world believes they have sought nuclear weapons. So these are really tough issues to resolve. Thats why were seeing them going into the early hours of the morning because they havent come to an agreement yet simply that they can take away and both be happy with. Woodruff Indira Lakshmanan, it sounds like youre going to have a listening night. Thank you. Woodruff in the days other news, the Obama Administration formally pledged to curb u. S. Greenhouse gas emissions up to 28 over 10 years. Its part of a proposed global treaty. The cuts would come from vehicle and appliance efficiency standards, and from limits on power plants. Some of those steps face challenges in congress and the courts. The defense has rested in the Boston Marathon bombing trial, without calling the accused bomber, dzhokhar tsarnaev, to testify. His lawyers admit he took part in the 2013 attack, but theyre trying to save him from the death penalty. They called four witnesses to show he was influenced by his brother. Closing arguments begin on monday. Saudi arabias growing military campaign in yemen intensified today on land, sea and in the air. Jonathan rugman of independent Television News has this report. Reporter after six days of saudi air strikes, yemen is on the verge of total collapse. So says the u. N. , which adds that over 90 civilians have been killed here in the capital in the last few days. Saudi warplanes trying to drive shia rebels back but making enemies in the process. translated they hit us until they completely destroyed these homes while we were sleeping at home. Reporter in the north, a u. N. Refugee camp was hit by saudi jets, leaving at least 40 dead. The u. N. Said it was shocked. Yemens foreign minister blamed rebels for being there. There is some population or houses, and theyre trying to put people there. Reporter last night the saudis hit this munitions warehouse near sanaa. While the missiles are landing the International Committee of the red cross has failed to negotiate delivering medical supplies by air, not in the midst of this burgeoning sunnishia war. The alliance may strengthen as the saudiled Arab Coalition weighs up a possible land invasion next. Because air strikes may not be enough to dislodge them, and theres in sign of a political way out of this crisis, let alone a ceasefire. Woodruff the saudis say they mean to restore to office yemens president Abdrabbu Mansour hadi, whos also backed by the United States. President obama today released military aid to egypt, as the cairo government moves to form an Arab Alliance against terror. The aid had been on hold since the Egyptian Military overthrew islamist president Mohammed Morsi in 2013. It includes 12 f16 fighter jets, plus missiles and other weaponry. In iraq, Government Forces fought their way into the center of the city of tikrit, against Islamic State militants. Military officials said troops attacking from the south and west have recaptured at least 75 of the city. The interior ministry reported streettostreet fighting, with at least 40 Islamic State fighters killed. Prime minister Haidar Alabadi spoke in baghdad. Transtransid like to present to you the good news weve raised the iraqi flag. They are now purging other parts of the city from the Islamic State militants. Woodruff the operation to retake tikrit began earlier this month, with iranian support, but it stalled. Last week, the iraqis called in u. S. Air strikes, and the ground offensive began moving again. The United States committed over half a billion dollars today to help syrian refugees. It was part of nearly 4 billion pledged by nations at a u. N. Summit in kuwait. Almost 11 million people, half of syrias population, have been displaced by the war. And back in this country, a lateday slide on wall street wiped out most of mondays gains. The Dow Jones Industrial average lost 200 points to close under 17,800. The nasdaq fell 46, and the s p 500 gave up 18. Still to come on the newshour the fallout over an indiana law that claims to protect religious liberty. A new leader for one of africas biggest nations. In the wake of the germanwings crash, what makes a pilot fit to fly . New technology to amp up your brain activity. Nprs scott simon chronicles his mothers final days. And, using music to fight discrimination in a war torn country. Woodruff now the fight over woodruff longtime nigerian president Goodluck Jonathan conceded defeat today in his re election bid in africas richest and most populous nation. He lost by at least 2 million votes to challenger muhammadu buhari. Jeffrey brown reports. Brown supporters of buhari celebrated in the Northern City of kaduna, an opposition stronghold, as word of the results spread. I am out because i am happy about the change of government. Brown later, president jonathan called buhari to congratulate him, making it official. The winner, a muslim and former military ruler, swept the muslim north. Crucially, he also scored well in states across southern nigeria, where christians predominate and jonathan had his power base. The outcome stunned the ruling party, and one of its officials even disrupted the electoral commissions proceedings charging, we have lost confidence in you but for buharis all progressives congress, the results were momentous. We are all happy because we are witnessing history in the sense that this is the first time in nigeria that a sitting government would be voted out of power using purely democratic means. Brown buhari initially came to power in a military coup 30 years ago, but says he became an advocate of democracy after civilian rule returned in 1999. He says hell draw on his experience to stamp out the violent boko haram militants. With my background as a military man i think we have to quickly restore the morale of the Nigerian Military and the reinforcement agencies by certainly getting weapons, retraining, and reorganization. That is absolutely necessary. Brown for now, both sides are also watching for the kind of postelection violence that plagued the country four years ago. Brown joining me now is nii akuetteh, executive director of the african immigrant caucus. What do we know about what explains this election . Is it antijohnson or prochallenger at this point . I think it is both. I would put the emphasis on antijonathan because, for one thing, this party that just won there had been splinter party, four of them, and they came together because they had been losing to jonathans party since 1999, but also this time jonathans party split. There was an internal dispute and a lot of them left. I think thats an undercounted factor. They left because some of them had said there was an agreement that jonathan should not stand. So the internal problems and the external coalition both help explain it. There were other political issues like the economy like boko haram. Brown let me ask you more about muhammadu buhari. A former military dictator, why would he be elected in a democratic election . I think were going to be learning more about him. Though he was a former head of state, it was only for a brief time. He has run three times and lost, and so people have i think outside of nigeria have a fairly simplistic view of him but his image will be fleshed out now. For one thing, hes seen as a very austere, incorruptible man. He also has run four time, so clearly hes determined that there is something that he can do for nigeria. This time so many nigerians supported him outside. Before he didnt but this time he got support in the south, too. Brown do you sense implications for boko haram because that has been much of the International Focus but also in nigeria . I do. In the past elections were postponed because the military wanted more time to deal with the insurgents. People were sceptical, but i think an objective look on the ground says they now have boca raton boko haram on the run. They are terrorists so they can pop up at any time but it seems to me their back has been broken, so president buhari will have to mop up, and make sure they dont crop up again and they dont spill over into neighboring countries. Brown you see signs they are on the run, but the fight isom over, is that what youre saying . That is what im saying. I think it would be dangerous to assume theyre beaten and take your eyes off the ball. Brown what about the stakes for the United States . What impact does this have on our relations with nigeria and for that matter with the larger reason because of its Important Role there . I think its actually a new and fresh and welcome beginning. I know people, the u. S. Officially stayed neutral, but in my own picking up in the streets of washington, i felt that people were tired of jonathan and they would like a fresh face. Now we have somewhat of a fresh face, and the u. S. , because of Boko Haram Nigeria is the richest country, the largest economy in africa. Somebody has estimated that the middle class in nigeria is almost as large as the population of germany and so when the hiccup over the drop in oil prices is gone, i think economic relations between the u. S. And nigeria will be very strong. So both on security and on the economy, i think the u. S. Will want to strengthen its relations with nigeria. Now, the kind of thing i see in the daytime, we like strong relations. We would have liked nigeria to receive more help fighting boko haram in the same manner the u. S. Has given for the fight against isis. I actually get the impression the u. S. Is about to do that now. Brown youre seeing more possibility of that . Right. Brown all right. Nii akuetteh, thank you very much. Thank you. Woodruff now the fight over religious freedom and discrimination. Late today, the Arkansas House of representatives passed its own controversial law and the governor has indicated he will sign it. Newshour Political EditorLisa Desjardins is in indiana this week, where theres been an uproar over the religious freedom restoration act or r. F. R. A. That many claim will allow businesses to discriminate against gays and lesbians. Indianasgovernor tried to answer critics this morning. Let me say first and foremost r. F. R. A. Was about religious liberty, not about discrimination. As i said last week had this law been about legalizing discrimination i would have vetoed it. Reporter indiana governor mike pence took 37 minutes to try and roll back five days of questions about whether he signed an antigay law. I abhor discrimination. I was raised with the golden rule, you should do unto others as they should do on to you. Reporter as the Indiana Republican aimed to define his new law as not discriminatory. Hoosiers were at lunch, and less certain about how to digest their governors words. He still hasnt said what hes going to do. Reporter the News Conference played on tvs usually reserved for football or music videos at ollies sports bar in indianapolis. I think he talks in circles, he realizes he made a mistake. A lot of us do believe this is a backlash against gay and lesbian marriage laws. Reporter all of this is happening as, and in large part is boiling because, the pinnacle of all College Sporting events, the ncaa final four championship, is set to begin this weekend in indianapolis. And that put an extra spotlight on indianas religious freedom restoration act. On sunday pence appeared on abcs this week. Do you think it should be legal in the state of indiana to discriminate against gays or lesbians . George. Its a yes or no question. Come on. Hoosiers dont believe in discrimination. Reporter pence now admits he could have done better. Many loud voices in his state let him know. No hate in our state reporter gay Rights Groups held two rallies in the past four days, this one yesterday, seizing modern republican watchwords like liberty, and also drawing a direct line to civil rights sins of the past. You will never get me, my family, my friends or anybody who i know of social justice or is civic minded to agree with a bill that brings jim crow back to indiana. Reporter with a standing room only crowd on hand monday the Indianapolis CityCouncil Voted on its own resolution. Nine republicans joined democrats like zach adamson, who is gay and married. The Indianapolis City county council is opposed to the recent passage of r. F. R. A. Reporter some voices in the Indiana Business community were also u