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Ifill they say theyve got their man. Now, theyre trying to figure out his motive. An arrest this morning in new jersey has ended a manhunt in a series of bombings and attempted bombings around new york city and new jersey. Ahmed khan rahami was loaded into an ambulance, bloody and dazed after a gun battle with police. The 28yearold naturalized u. S. Citizen from afghanistan, wasom captured in linden, new jersey after he was recognized sleeping in the doorway of a bar. That was just hours after police sent text alerts to millions in the new York Metro Area to be on the lookout for him. After the shootout, in which two Police Officers and the suspect were injured, new york city mayor bill de blasio firmly labeled the bombings terrorism. I we have so more much information obviously than we did even a few hours ago. Theres new information coming in all the time, based on the information, we have every reason to believe this was an act of terror. Ifill it all began on saturday morning, in a bomb attack in the beach town of seaside heights, new jersey,er before a charity race to benefit marines. No one was injured. Later that night, in the chelsea neighborhood of manhattan, another bomb went off, injuring 29 people. Surveillance video allegedly caught rahami planting the v device. A second device, made from a Pressure Cooker filled withke shrapnel, was found undetonated a few blocks away. And last night, five more pipe bombs were found at a train station in elizabeth, new jersey. As robots worked to dismantle them, one exploded suddenly. Officials linked all of the attacks to rahami, but offered limited details about how. But with rahami as a named suspect, police descended on his family home in elizabeth. Hes a very friendly guy, thats whats so scary. Its hard when its home. They never seemed out of the ordinary, they just americanized. You wouldve never knew k anything. Ifill at a midday pressfi conference, an f. B. I. Official said the agency cannot yet say why rahami planted the bombs, but that he appeared to have acted alone. I have no indication there is a cell operating in the area or in the city, the investigationon is ongoing, but i have no indication there is a cell operating here. Ifill president obama weighed in from new york, whereo hes attending the United NationsGeneral Assembly. Even as we have to be vigilant and aggressive, in making sure we find those who carry out attacks, we all have a role to play as citizens making sure we dont succumb to fear. Ifill in the wake of the attacks and with hundreds of World Leaders converging on the city, police and bomb sniffingrl dogs swarmed new yorks penn station today. In addition, 1,000 National Guardsmen have been deployed ona the streets of new york city. Rahami underwent surgery earlier today. He was shot in the leg during and the arm during the shootout with police. Well have more on the investigation right after thegh news summary. Woodruff in the days other news the president said theres no connection between theti bombings in new york and new jersey, and the stabbings at a minnesota mall. Ten people were wounded in the saturday night incident. Ig the Islamic State claimed it inspired the attacker, who was killed by an offduty policeman. Hes identified as dahir adan, a College Student from somalia. Ifill the Syrian Military declared today that a weeklong ceasefire is over, and within hours, launched dozens of air strikes. The u. N. Confirmed a humanitarian aid convoy was attacked, and oppositionat activists said it was hit by russian or syrian planes. In new york, secretary of state john kerry refused to concede the truce is dead. Uc the russians need to control assad, who evidently is indiscriminately bombingly including on humanitarian convoys. So lets wait and see. Well collect the facts. We need to see where we are, and then well make a judgment, but ifill activists said thesa various air strikes killed more than 30 people, including a dozen in the aid convoy. Woodruff u. S. Air strikes may have accidentally killed at least eight Police Officers in afghanistan. An afghan commander says it happened sunday near tirin kot, the capital of uruzgan provinceu the u. S. Military confirms planes carried out an air strike there, aimed at taliban forces. Ifill in russia, supporterss of president Vladimir Putin won a landslide in sundays parliamentary elections. The united russia bloc took threequarters of the seats in the lower house of parliament. The party will have enough votes to pass constitutional amendments on its own. Turnout was down sharply fromn the last election, in 2011. Woodruff scientists now sayy the haze from forest fires in indonesia may have led to theed deaths of more than 100,000 people. That is based on new analysis of mortality data. The fires were used to clear land, and burned for weeks last year. Researchers at harvard and columbia universities say most of the deaths occurred incu indonesia, singapore and malaysia. Ifill signs of progress i today against the zika outbreak in miami, florida. Health officials dropped their warning to pregnant women to avoid the citys wynwood arts district. They credited aerial spraying of the mosquitoes that transmit the virus. Woodruff for the first time, federal prosecutors say new Jersey Governor Chris Christie knew a bridge was being closedcl to punish a political foe as it was happening. The governor denies that, but the prosecutors say a witness will so testify at the trial of two christie allies. It opened today. A defense lawyer called theop witness a habitual liar. Ifill and wall street was mostly uninspired today. The Dow Jones Industrial average lost three points to close at 18,120. The nasdaq fell nine points, and the s p 500 slipped a fraction of a point. Still to come on the newshour a deeper look at what we know about the bombings in new york y and new jersey, the president ial candidates respond to the attacks, u. N. Leaders search for solutions to the worlds refugee crisis, and much more. Woodruff we return now to the attacks in new york and new jersey. With the capture of a man suspected of planting bombs in both states over the weekend, come new questions about the Terror Threat and stoppingst radicalization in this country. Joining us now to address them juliette kayyem, shes a former u. S. Department of Homeland Security official, and author of the book, security mom an unclassified guide to protecting our homeland. And lorenzo vidino, the director of the program on extremism at George Washington universitys center for cyber and Homeland Security. And we welcome both of you to the program. Lorenzo, let me start with you. What do you make of this manma Ahmed Khan Rahami and what he did . We dont know a lot of facts at this point. I think most indications point to the fact he had some kind of political motivation. Everybody is talkingca about terrorism. We dont know much about his radicalization. Were getting tidbits here and there of visits to afghanistan, which dont mean much because hes of north african descent. If you look at the tactic, you look at a Pressure Cookers, its something al quaida sympathizers used in the past. The targets seem to have some political motives, a certain neighborhood in new york, the marine corps marathon. We dont know much. I think were starting to get a picture of somebody who had some signs of radicalization. Woodruff juliette kayyem,te what do you make of this, the sophistication of it, how he carried it out . Not very citiescated in terms of the Pressure Cooker. How to make it can be foundun online and the different elements are pretty rude manner. He did make a large quantity of them, but just to remind viewers, if all of these incidents are connected, he had about a 25 success rate. What im carious about is how quick was that radicalization process, you know, was this over three months and he figured it out how to do it quickly or was it over two years and were there a number of people involved inlv the action. I think that whether be relevane to determine whether it was just him as a parent, or a larger network. So i wouldnt close anything off yet solely based on theba materials or the bombs. Bo woodruff lorenzo vidino, what work needs to be done now to figure out if others need to be involved. Ed his connections overseas and domestically. Well figure out his acts if he had facebook, twitter account, who he was talking to, his cell phone. I think most immediately are his contacts here in the states. The assumption, i think, isis there are no contacts trying to plan followup attacks, but obviously, obviously, thats not a guarantee. But trying to see who he had contact with in the United States. Contacts oversarks if he had somebody directed him or at least aware of what he was doing overseas. Woodruff juliette, we learned his family moved to the United States in 1995, we figured he would have been 7 years old then. He grew up in this country in that new jersey community, did travel back to the region, we believe, the last few years. But what does that add up to . It has up to that we dont necessarily have an immigrationm problem, we have a citizen problem. I mean, unless someone ison willing to say anyone whos been naturalized here is automatically suspect, most of these men are u. S. Citizens, but the good news is its a very small percentage of the Islamic Community so far. So so what we need to look at isnt so much is maybe what happened when he traveledle abroad. We know there is a couple of trips. We know there is a discussion of a potential of a marriage he may have had, so we may need to looo at the review process, the interview process when hen returned from afghanistan, butis also the radicalization processi at home or online. So this investigation will look very familiar, because they will be talking to friends and family of his, and then there will be, you know, basically the online footprint review, who is hehe talking to online, was there encrypted information, to get aa better picture of who he is andn of course, the most important thing, the radicalization t process, the only way to stop it from happening in the future. Friends described him as more serious and religious as he came back from one of these or all of these trips to afghanistan. A what does it take to put somebody on a terrorist watch list . Well, its obviously not becoming more religious. E thats something that cannot by in itself lead authorities to profile and say just because somebody has become more conservative and more religious, that he can be seen as a security threat. That element together with other elements can lead us to put somebody on the radar screen or a watch list. Its obviously very difficult. In many cases, were talking about just internal, psychological processes which are, at times, put online, manym other cases theyre not. So its very, very difficult for authorities, if there are no connections, no communications, to really know if somebody is of interest and potentia potentialy dangerous. Woodruff so, juliette, what can be done in theseoru circumstances . As lorenzo said, just because someone becomes more religious doesnt mean that they are automatically considered suspicious spicious. And lorenzo is exactly right. Thats why people who have been in government or Homeland Security talk about the Homeland Security enterprise because the idea that the government ise going to be able to prevent alll these things from happening is just a fiction, so that is why there has been a tremendousn focus on outreach to muslim and arab and other communities to integrate them into Law Enforcement to have the kind ofd relationships that are necessary. In all of these cases, and im sure well find this in this case today, but in all previous once, a some person knew it was not a guy in the f. B. I. Or surveillance, it was the exwife, the wife, the father. So at a time when discussions are heated about what to do about the islamic radicalization problem, the better way to think about it is its not a problembl and to integrate and assimilate with these communities will be the best way to minimize the threat thats sometimes coming from those communities. Co woodruff what would you add tot that, londerso . We had this conversation after san bernardino, after orlando with those incidents. What more does it take to try to anticipate these things before they happen . The reality is some incidents are impossible to prevent. Another illusion is we can prevent anything. Unless you completely militarize a swoit nobody is arguing that we should, you can prevent anything. Juliette is perfectly right in saying we should work more with communities. I think you can add more resources in terms of what were doing online, getting all the social Media Companies to workk with the government. Again, understanding the balance of Civil Liberties and First Amendment with the need off security and obviously its a very difficult balance to maintain there. There are realities that not everything can be prevented. Its ugly to say but a reality. E woodruff one last question, lorenzo. On what are the questions you haveh in mind now that you think authorities will trying to get answers to. S i think the context in the community, i think who he was talking to, a friend, part of a study group, generally in termse of what we see in terms of radical sarks even lone wolves, at time are interactive with people both online and offline. Even a little group of five or six individuals decided to act but the others had the same kind of mind set. Maybe they stopped one step short of acting. N will some of them act . Was he talking to other people . Maybe he was not. But its very important to know who he was talking to. G woodruff lorenzo vidino, juliette kayyem, we thank you both. Thank you. Woodruff and online, follow everything we know about the bombing. Plus, watch as science correspondent miles obrien explores the difference betweenr a Pressure Cooker bomb and a pipe bomb. Ifill the attacks were alsoh the focus on the campaign trail today as Hillary Clinton and donald trump pushed to convince voters that they can keep americans safe. John yang reports. Reporter with Terror Threats suddenly center stage, Hillary Clinton used her years as secretary of state to say shes ready to handle national security. I have sat at that table in the situation room. Ive analyzed the threats. Ive contributed to actions that have neutralized our enemies. I know how to do this, and i reporter donald trump used this weekends attacks to underscore a defining theme in his campaign. We have seen how failures to screen who is entering the United States puts all of our citizens everyone in this room at danger. So let me state very, very clearly immigration security is national security. Reporter both candidates also tried to highlight their Foreign Policy credentials clinton, by meeting with ukrainian president Petro Poroshenko and japanese Prime Minister shinzo abe on the sidelines of the u. N. General u assembly in new york. She and trump are also to meet separately with egyptian president abdelfattah elsisi. B meanwhile, clinton and running make tim kaine campaigned separately on college campuses. Young voters were a key part of the coalitions that twice elected president obama, but this time around, clinton isis having trouble winning them over. Even if youre totally opposed to donald trump, you may still have some questions about me. I get that, and i want to do my best to answer those questions. Reporter clinton has a Light Campaign schedule for the rest week, ahead of the first debate with trump a week from today. Ru for the pbs newshour, im johnr yang. Ifill and with 50 days left until election day, we turn to politics monday with amy walteri of the Cook Political Report and tamara keith of npr. Tam, lets talk about what the say on theead to attacks. First, we hear Hillary Clintonar trying to sound knowledgeable and donald trump trying to sound strong. Which of them wins the day on days like today . And this is really a microcosm of the campaign. Donald trump comes up and he says things that are big and bold and in some ways controversial saying maybe we need to bring back profiling and profiling at mosques, possibly, and says that i. S. I. S. Wantss. Hillary clinton to win. Meanwhile, Hillary Clinton comes out and says, i was in the situation room, i have all these plans, ive got a plan for i. S. I. S. And this is the way the campaign goes, you know, day after day after day. Ifill