Highprofile security around parisian landmarks projects an image of force and vigilance, but, in fact, most Public Places are soft targets, as fridays attacks proved. [gunfire] with chilling clarity. An expert on terrorism. The terrorists have realized big western cities are very vulnerable. Very vulnerable. We were protected by our security. This protection has failed. So all the cities in the world, all the main capapals are now really vulnerable. Reporter it was a game changer. It was a game changer, yeah. Reporter the french president today described syria as the greatest terrorism factory the world has ever known. And right now more than 500 french citizens are there, fighting with isis. At least three of the men directly linked toto fridays attatas did time on that known french intelligence. One of them was even supposed to report regularly to the police but had stopped showing up. Then three days ago he surfaced as one of the killers at the bataclan concert hall. Ththtruth is thatt with 10,000 open files on suspected radicals that need monitoring, itser in person or online, french intelligence is simply overwhelmed. Pelley liz palmer, thank you, liz. The dragnet extended quickly beyond france, and allen pizzey reports tonight from belgium. Reporter the International Manhunt broughtt Belgian Police to thisouse in the brussels suburb of molenbeek where they thought one of the suspects was hiding, but they came up empty handed. Their target was Salah Abdeslam, a 26yearold man authorities believe rented a car that was used in the attack. He was reportedly stopped by the police and then released just hours after the attacks, and it was s ared he returned to this the two men who were with Salah Abdeslam have now been arrested and one of his brothers blew himself up with a suicide vest outside a restaurant. A third brother, mohamed, said his family did not understand why they did it. We never had any problem with justice, heheaid. My parentnt are in shock. They dont quite realize what has happened. The impoverished suburb of molenbeek is known to be a hotbed of jihad itself recroom. The mayor says at least 30 young men have left here to go the fight for isis in syria. The neighborhood was also home to this man, abdelhamid abaaoud, whwhfrench investigators believe is the mastermindehind the terrorist t tacks. Abaaoud is now thought to be in syria and has appeared ib isis propaganda videos. He even recruited his own 13earold brother into isis. Molenbeek is where the Justice Departmenty jihadi and criminal worlds meet, onestop shopping for drugs, explosives and automatic weapons, a extremists dream, a securury nightmare. Scott . Pelley allen pizzey in brussels. Thank you, adlen. It appears at least one attacker slipped into europe in the wave of refugees that fled syria. The clue is in a passport found near the body of a suicide bomber outside the soccer stadium. Hollande Holly Williams picks up the story in athths. Reporter greece says this man arrived on its shores claiming to be a refugee on october 3rd and used this syrian passport, suspected to be fake, which identifies him as ahmad al mohammad, 25 years old and born in northwestern syria. Ioannis mouzalas is the greek immigration minister. He didnt have any record . Nothing. Reporter so there was no reason for you to suspect he might be a terrorist . He was on a boat with the refugees. Reporter the mancariing the passport crossed to greece from turkey, the same route usese over 600,000 migrants this year, many of them Syrian Refugees. He didnt appear on any International Wanted list, where he was registered by the greek authorities, fingerprinted and then allowed to enter europe. If someone is fleeing and going to be a a extremist, you can take it anyere. Reporter itsp long been feared isis could use the flood of refugees to smuggle its fighters into europe, but, scott, this case seems to show just how easy it is to do so. Pelley holly wililams. Holly, thank you. And president obama said yet again today that he wants the resettle tens of thousands of refugees in the u. S. But after paris, his plan has hit a roadblock, and heres nancy cordes. Reporter the terror parted sudan issue in this country today, with at least 15 governors, all repeplicans, annonocing they will try to block Syrian Refugees from resettling in their state. Michiganovernor rick snyder. Were going to suspend things until we get a chance to talk to the u. S. Department of homeland security. Reporter he and others say theyll direct state agencies not to provide syrians the types of Relocation Services normally supplied to refugeeee Massachusetts Governor chahaie baker the safety and security of the people of the commonwealth of mass is my highest priority. Reporter that sentiment was shared by more than half the g. O. P. President , field, who said the u. S. Should halt plans to welcome 10,000 Syrian Refugees over next year. T tre are refugees t tt need to be cared for, but they should be resettled in the middle east majority muslim countries. Reporter frontrunner nald trump said he might also close some mosques if he becomes president. Strongly consider because some of the ideas and some of the hate red, the absolute hatred is coming from these areas. Eporter roughly four million syrians have been splaced by the fighting. Applicants for resettlement here are screened by the departments of state and homeland security. Former Florida Governor jeb bush argued the u. S. Should focus on accepting syrian christians, not muslims. Because theyre being slaughtered in the country, and but fofous who . Reporter the president sharply rejected that sentiment. Shes shameful. Thats not american. Thats not who we are. We dont have religious tests to our compassion. Reporter the new House Speaker paul ryan says hes consnsering legislation thth would beef up screening for refugees. The reality is, scott, theres very little a gough could do to keep someone from moving in their state once theyve been allowed into a country. Pelley nancy cordes at the capital. Nancy, thank you. The paris attacks are the third major operation claimed by isis in just over two weeks. A russian jetliner blew up over egypt, killing all 224 on board. U. S. Officials say the bomb. A bomb was the likely cause. Last thursday twin suicide blasts in beirut killed 43. But after paris, were in a whole new world according to michael morell, a former number two at the c. I. A. And now cbs news Senior Security contributor. I say whole new world for two reasons. One is isis now has developed an attack capability in the west. They told us that they would do that. Theyve now done it in western europe. They told us that they w wld do that in the united states. They will eventuallyyo that unless they are degraded. The second whole new world here is the targets theyve chose on the attack. People dont sympathize with, but they certainly understand when isis attacks a government target or a military target or even Charlie Hebdo when somebody has defamam the prophehe its much more difficult to understand an attack on our very way of life that sows fear and terror. Pelley to that end, isis has posted new threats online and jeff pegues has more on that. Reporter the video purporting to be from isiss promised an attack on washington, but u. S. Officials say there is no specific or credible threat against the united states. On capitol hill, police are telling Congressional Staff to take precautions like using the tunnels around the capitol instead of walking above ground. And in new york, a new ecialized police unini is providing extra security at kilocations, swat teams and bombsniffing dogs are patrolling train station, airports and nfl stadiums around the country, but a response to a threat is only as good as the intelligence. And u. S. Law enforcement believes one blind spot is when terrorists g g dark, hiding their online communications. Investigators say members of isis lure sympathizers to apps where the messages selfdestruct or encrypted. Law enforcement has been pressing the Technology Industry for access to that data when natitial security is atisk, but so far m me si concernsave won out. C. I. A. Director john brennan. I do hop that this is going to be a wakeup call, particularly in areas of europe where i think there has been a misrepresentation of what the intelligence and Security Services are doing. Reporter brennan warns more attacks like paris could be coming. I would anticipate that this isil has in the pipeline. Reporter the Tech Industry says calls to weaken encrypted products undermine cyber security. Scott, a Law Enforcement source is confident the attackers used encrypted communication, but its unclear whether investigators have the attackerer cell phones and computers. Pelley jeff pegues in washington for us tonight. Jeff, thank you. The french air strikes overnight in syria targeted raqqa, which isis claims as the capital of its socalled caliphate. David martin has that. Reporter the french chosed targets based on sensitive u. S. Intelligence that had not been provided to them before the paris attacks. They were military targets, a command center, an ammo dump and training camp, which the u. S. Would have hit sooner or later in any event, as Charlie Dagata reported from northern iraq. This is a show of force for the french and a m msage france is fightinin back. Reporter however, u. S. Officials say there are plans to hit new targets that had once been off limits, installations previously considered part of the civilian infrastructure, isis release on the run the territory it occupies. Until now civilian targets have been limited to the Oil Facilities isis uses to generate an estimated 1 million a day in ack market oil sales. U. S. Officials say those strikes have been ineffective, causing damage that could be repaired within a day or two. Two weeks ago the u. S. Began a Bombing Campaign designed to knock out Oil Facilities for six months to a year. Last night american a10s and ac130 gun ships destroyed 116 tankererrucks in syria after first dropping leaflets and conducuing runs to scare the civilian drivers away. More strikes against more targets will increase the risk of civilian casualties, especially since u. S. Officials now expect russia to increase isis. Scott . Pelley david martin at the peg. David, thank you. In a story for 60 minutes, we spoke with two survivors of the attacks, Mark Colclough witnessed the shooting at a cafee, and man named francois, who did not want us to use his last name, suffered a grazing bullet wound from the music hall massacre. [gunfire] i heard the gunshots, about ten. He shot in my direction, so i just laid down on the floor, like head on the ground, and then thats how i felt the bullet in my back. Pelley can you show mee where you were hit . So i was shot here on the back just below my shoulder, and the bullet came out here. Pelley so lucky to be yeah, yeah. He shot three of them just like that. E three that were sitting outside he shot very quickly. Then he shot into the car. Then he moved into the cafee, looked out, panned right with his weapon, didnt shoot, panned left, duck, duck, duck, pause, duck, duck, duck, pause. Very quickly. They ran into the cafee. P pley when you went into the cafee, what did you see . Wounded. 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That picture, nohemi under the moon in amsterdam, was shot by her friend cal state student niran jayasiri. She was always a very cheerful person. You always see her in a bad mood. She always smiled at you and you wonder how l le shes been working. Shes just a charismatic person. Pelley he may have been the last to see nohemi alive, standing next to her at a cafee as a terrorist opened fire. At first i thought it was firecrackers because it sounded like firecrackers. I looked in the direction the noise was coming, and i i saw a gunmnm just walalng on the sidewalk, just shooting everywhere. Pelley and in that moment you thought what . Run for it. Just run for it. Pelley he ran with a wounded student. They hid until help arrived. Jayasiri and ana ramamez met nohemi as freshman fourur years ago. The way i see it is in the that we lost her but we have to just remember what she taught us and thats how shes going to be present with us. I know shes here with us. 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Er every few months i go to walter reed and see a 25yearold kid who is paralyzed or who has lost his limbs, and some of those are people ive ordered into battle, and so i cant afford too play s se of the political games that others may. Reporter as for critics of his strategy, president obama dismissed them as all talk. For now the president is putting hisp weight behind a diplomatic gamble to broker a ceasefire in syria. Traveling with the president , margaret brennan, cbs news, turkey. Pelley final words from paris in a moment. Thats why i have the spark cash card from capital one. I earn unlimited 2 cash back on everything i buy for my studio. And that unlimited 2 cash back from spark means thousands of dollars each year going bacac into my business. Thats huge for my bottom line. For adults with an advanced lung cancer called squamous nonsmall cell, previously treated with platinumbased chemotherapy, its not every day something this big comes along. A chance to live longer with. 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So look for powerful Cold Medicine with a heart. Coricidin hbp. Pelley here in paris the eiffel tower will be lit in blue, light and red for three nights of mourning. Have a look at the red section. Thats t t motto of paris, tossed by not sunk, a tribu to the resilience of the city where light always overcomes darkness and where today the sound of silence. Thats the cbs evening news from all of us at cbs news all this is the jeopardy tournament of champions. Now lets meet todays semifinalists an attorney, originally from gillette, new jersey. A Computer Programmer from ann arbor, michigan. And a volunteer at Casa Guardian ad litem from manchester, new hampshire. And now, here is the host of jeopardy alex trebek thank you, johnny gilbert. Thank you, ladies and gentlemen. And welcome, everyone, to the big money week in our tournament of champions. At the end of this week, on friday, we will be awarding 400,000 to our three finalists. 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