We begin with a fresh round of raids across france as Police Search for the alleged mastermind of those coordinated isis attacks in paris. For a moment they thought they had the suspect surrounded. It turned into a deadly showdown there. Were hearing multiple blasts right now. Were not sure what those sounds of explosions are. Several hundred yards down the road. Were in the middle of a terror takedown. Theres another one. Police have been announcing their presence here as those explosions sound out. Raids French Police say that neutralized a terror team on the brink of another attack. Just before dawn, gunfire and explosions explosions. Antiterror Police Firing nearly 5,000 rounds for close to seven hours. One video emerging tonight. Showing what appeared to be the first french s. W. A. T. Team arriving. And entering this suburban apartment building. On the third floor an alleged isis safe house. Police received intelligence through surveillance and cell phone data that the alleged attacks, 27yearold abdel what maud adhad, was inside. They moved in using grenades and assault rifles to crack open the reinforced door. Once police got inside they were met with return fire. Then a woman blowing herself up with a suicide vest. Gloria and stefan were jolted away. I heard shots being fired which worried me so i was looking left and right because there were cops everywhere blocking the street and there were more shots coming from my left. The street that was occupied by the terrorists. Sabrina, another resident, lived one floor below the safe house. We saw bullets, lights, laser beams in our direction that were real explosions. We felt the building shake. She said she was hiding with her baby in the bathroom when she heard the terrorists from above. There were guys upstairs there, there they were talking and the policeman well saying, reload quickly this neighborhood with a large Muslim Population locked down, thousands shut in their homes, and this family shut out. We witnessed the tension boiling over when these two young men clashed with gunwielding officers trying to cross a blocked street in the middle of the siege. Clearly theyre jittery here. We arrived at the scene just after the shootings started. They continue to push us back, something is still going on back there. In this cell phone video you can see suspects being led away by the s. W. A. T. Teams, some of them stripped of their clothes. Ultimately, eight were arrested, one woman and seven men. Including juwan bendawu, identified as the suspects landlord, before being led away he told reporters he didnt know the men were terrorists. Saying, someone asked me to put the people up for three days and i did them a favor and its normal, i dont know where they came from, and i dont know anything. If id known do you think i would have done it . Officials have yet to reveal the identities of the others but confirm they dont know the target. Tonight police combing the bombedout apartment searching for clues and signs of the missing jihadist. Teams and their headlamps in that building. You can tell how much fire power Security Forces poured into it. We were listening to it, dozens and dozens of bullets, the top facade full of bullet holes, windows blown out. Forensics teams are looking for fingerprints of other individuals who were not present when the raid occurred to see if they can find traces to other people. Fingerprints, hair samples. Anything that would lead them to a Broader Network of contacts. Reporter its all part of a this raid just one of over 400 since fridays attacks that resulted in 64 arrests. And tonight french prosecutors revealing new intel. Texts from cell phones found in the trash outside the bataclan theater on one of those phones a message to a member of the terror cell at 9 42 p. M. Saying, were ready, lets go. Intel that the u. S. Will also be reviewing closely just tonight isis issued a renewed warning against the united states, these images pulled from a propaganda video that appears to show an isis fighter with times square behind him. This threat against new york city coming 48 hours after a similar one against washington, d. C. The city places great importance on the safety of new yorkers and the almost 60 million visit hoarse will come to this city. We will not be intimidated and we will not live in fear. Reporter paris already attacked. President hollande called a war against the terrorists. Marking day four of withering air strikes on isis targets. Russia launching strikes of its own, already destroying numerous isis oil depots and command centers. Bombing started when president Vladimir Putin confirmed a downed russian jet in egypt was the work of isis operatives. The terror group today proudly displaying an online post claiming this is exactly how they brought down that aircraft. A bomb in a soda can. They say they smuggled a can stuffed with explosives, possibly ignited by this small detonator with a blasting cap stuck down the can. Wired to this, the switch with a timer hidden behind the black tape. It has the components necessary, a power source which is what we believe is wrapped up inside the tape, a switch to control the function, a detonator, and an explosive charge which was in the can. Reporter the whole thing likely costing no more than 50. Bomb experts say it could be used to produce a blast much more powerful than the one in this government test, like the one that downed that russian jet. U. S. Aviation Security Officials say screening machines should be able to spot a soda can bomb like this, but there is concern that no Security System is foolproof. Even with the best of security screening machines, if you have an insider willing to place an explosive on a plane, you have a real problem. Reporter security concerns that cast a long shadow from here to france. Tonight, parisians continue to mourn the 129 victims who died in fridays massacre. As doctors race to treat the almost 200 still in the hospital. For nightline, im matt gutman in paris. Next, a bitter politicians tangle over whether america should accept Syrian Refugees. Are they a threat . Should there be some sort of religious test . Or that is unamerican in the war of words between senator ted cruz and president obama. Its contrary to who we are. And it needs to stop. Because the world is watching. Where new seafood combinations like the new grand seafood feast are stepped up, spiffed up, jazzed up. 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The horror in paris has raised urgent and emotional questions about whether america should accept refugees from syria. Some believe turning these people away simply makes sense saying they pose a terror threat. Others say that attitude is simply unamerican. For the tired masses fleeing the war in syria, Global Sentiment seems to have changed swiftly and severely. Just months ago the world was aghast over images like this. A lifeless syrian boy washed up on a beach in turkey after he and his family tried to make it to greece. His father inconsolable. Everything is gone, he said. It led to an outpouring of empathy and interest. Of thousands of refugees crossing borders, searching for safety. This is the largest mass migration in history in europe since world war ii. This is the front lines of it. While they were sometimes met business resistance, for the most part it seemed like the world wanted to help. But now, after paris, that may be starting to change. One of the terrorists killed during fridays attacks was found with a fake syrian passport identifying him as a refugee. Stoking fears that isis may be using the human tide flowing out of syria as a way to camouflage its killers. In europe were now seeing antiimmigrant protests in the streets. Here at home governors from more than half the states now want to close the door to Syrian Refugees. A shift that is troubling to refugees who have already resettled here. People like mohammad al halallah and his eight children. He tells us he fled syria two years ago because of the indiscriminate killing, that nobody was safe. He says they were welcomed in this new community in arizona and they felt safe here. But since the attacks in paris, the governor of arizona has said he doesnt want any more refugees from syria. This father now says he is disappointed that the actions of a few terrorists have affected the lives of so many fleeing so much horror. He feels especially badly, he says, about the children who are, of course, blameless. And it turns out, according to the u. N. Human rights commission, more than 75 of Syrian Refugees the people many states are trying to block are in fact women and children. People who come here are vulnerable people, widows, orphans, families who have lost everything and theyre given a new chance here after very careful consideration by very well informed people right reporter and today the mayor of new york city, bill de blasio, making the case the children are the reason to keep the door open to those suffering. This is the cost of not bringing in people who are innocent victims of the humanitarian crisis. This childs death was on the front pages of newspapers all over the world. This image gripped the world, literally. Governor christie specifically said he did not think it was appropriate for small children to be brought in. Is this what he wants to see happen to people . Is this what he wants to see happen to children . We dont accept that here in new york city. Reporter and even after the attacks on his own country, the president of france seems to agree, saying he remains committed to taking in frances share of the refugees pouring into europe. But texas senator ted cruz and others think this kind of policy is simply too risky. He told my colleague jon karl he wants to ban all Syrian Refugees no muslims, but allow the christians in . Thats your position . From middle Eastern Countries where isis and lake have control of significant parts of those countries no muslims, only christians . Is that your position . Jon, can you say Islamic Radical terrorist . I can say radical islamist terrorist no problem. Youre saying no muslims, only christians . Christians are different in the middle east. Reporter president obama calling that proposal unamerican. Theyve been playing on fear in order to try to score political points. In order to advance their campaigns. And its irresponsible. And its contrary to who we are. And it needs to stop. Because the world is watching. Reporter senator cruz then firing back. I would encourage you, mr. President , insult me to my face. Lets have a debate on Syrian Refugees right now. Reporter one governor isnt the letter was addressed to me. Reporter carlene miller, a Refugee Court 98 nater er coordinator was about to place a family from syria in indiana when she was informed the governor blocked the program. The letter said the governor had directed them to Cease Services to refugees. Reporter miller says she had to act quickly to find the family another home. Tonight this family, starting a new life in connecticut, where arms. I have to say they were absolutely wonderful and charming folks. Reporter but others are concerned that this antirefugee sentiment is exactly what isis wants. As isis has written about extensively in their magazine, they seek to destroy this gray zone of coexistence between muslims and western societies. Because were starting to see world war ii, they definitely want to see this antimuslim backlash in the west. They want to see this islamophobia in america and the republican president ial campaigns because it will show to muslims around the world that muslims are not welcome in the west. Reporter critics point to cases where the screening process in america has failed. In 2009, two men from iraq with terrorist ties were resettled in kentucky. They were then arrested in an fbi sting accused of supporting insurgents back in iraq. After suspending the Resettlement Program for six months Officials Say theyve tightened the security protocols. Process. And if there is any doubt at all about someone, if some aspect of their story, their biography that they give, cant be verified, they dont get in. Reporter for this kind of perspective and reassurance may ultimately not carry the day. Because while the needs of the the fear. We should say well have the latest developments on the investigation into the attacks in paris first thing in the morning on gma. Speaking of gma, coming up next on nightline, something a little different. Abcs nick watt on an epic and sleepless journey, part of good morning americas 40th anniversary. He encountered truly extraordinary stories along the way. This special edition of nightline brought to you by nissan. Welcome to the most social car weve ever designed. The 2015 nissan murano. Recipient of autopacifics bestinclass Vehicle Satisfaction award. Now get great deals on the nissan murano. Constipated . Trust number one doctor recommended dulcolax use dulcolax tablets for gentle overnight relief and stool softeners for comfortable relief of hard stools. Dulcolax, designed for dependable relief you never know when itll be your moment to shine. So dont trust your smile to any regular toothpaste. Improved crest 3d white brilliance removes 5 times more stains than the red box. John is just two weeks away from walking down the aisle with emily. Didnt see that one comin. Now were groomsmen. Were just 475 short miles away from. Shenanigans. Its not going to get too crazy. Might get a little weird. You have places to go. Let us worry about getting you there. Bp gasoline with invigorate. What dear . Oh oh, youre bad. Stop that im sorry. vo a new york millionaire spent 714,000 to learn how to be a pet whisperer. What . Oh ho ho vo youd make a way better rich person. Finally tonight we are hours away from good morning americas 40th birthday bash. To mark the event abcs nick trip. Reporter that bus with eight of us living on it is driving across the country celebrating birthday. Were barreling towards pittsburgh. We are in downtown detroit we are in the Procter Gamble plaza in cincinnati im riding shotgun, yep, that is me with the cake. This is our living room. Look at that shower, rebecca. Thats a legit shower. On this trip a very special travel companion. Mothers day 2004, emeril delivering breakfast in bed to one deserving mom. After losing her best friend sally to cancer, judy quit her job and came home to michigan to raise her friends children as her own. Shes definitely most deserving of this. This woman gave up her entire life to raise us. Im proud of her. Because we dont always tell her how much we love her, how much were thankful. Reporter fast forward 11 years. Road tripping across the country. I made her recreate that scream from so many years ago. Aahhh reporter on our travels we met over the top one direction fans at the rock and roll hall of fame in cleveland. We love you amazing. Im so proud of them. Reporter enjoyed a pacapella from columbus to pittsburgh. Its nearly a fourhour drive. Tonight chowing down on famous pittsburgh sandwiches as we roll onwards towards the big apple. Well check back in with you later. Hopefully well be in times square during the show tomorrow. I think were going to make it. Im nick watt for nightline somewhere in america. Our thanks to nick, our thanks to you for watching abc news tonight. You can watch the gma live stream event at www. Abcnews. Com gma40. Well stay on top of the latest developments overnight on our Nightline Facebook page and at abcnews. Com. Tune into the real gma, the broadcast version, first thing in the morning. Thanks again for watching and