Thoughts of canceling or postponing the olympics, or is it full steam ahead . He said, full steam ahead. He said this weekend theyre in oregon today, a sixweek standoff between the fbi and armed antigovernment protesters ended peacefully. The final four holdouts surrendered. One refused to go quietly, though, ranting, liberty or death. Tonight weve learned the isis terrorist group in syria and iraq has chemical weapons in its arsenal. In a rare interview for 60 minutes we spoke to the director of the cia, john brennan. We have a number of incidents where isil has used chemical munitions on the battlefield. Yeah, sure. Isis has access to chemical artillery shells . There are reports that isis has access to chemical precursors munitions that they can use. The cia believes that isis has the ability to manufacture small quantities of chlorine and mustard gas. And the capability of exporting those chemicals to the west . I think theres always the potential for that. This is why its so important to cut off the various transportation routes and smuggling routes they have used. Are there American Assets on the ground right now hunting this down . The u. S. Intelligence is actively involved in being a part of the effort to destroy isil and to get as much insight into what they have on the ground inside of syria and iraq. Well have our full interview with cia director brennan, including the threat that he says keeps him up at night. Thats this sunday on 60 minutes. But there are tens of thousands who cant get out. Theyre trapped between russian bombers and a closed turkish border. Hollywood williams is following this. Reporter imagine the terror. Never knowing where and when the warplanes will hit next. We cant independently verify these videos, but they appear to show the aftermath of air strikes on the town of tel rifaat this week. In the syrian regimes new offensive, which is backed by russian air power, civilians are once again paying with their blood. Crossing the border into turk y we met abdul kahrim bahloul, who runs a school in tel rifaat. The shelling and air strikes are homes are destroyed and childrens bodies lie in shreds on the grounds. He told us he came to ask the turkish authorities to give refuge to children from the town. But after absorbing more than 2 million syrians, turkey is reluctant to let any more in. Syrian Regime Forces have now nearly encircled the city of aleppo. The u. N. Fears that 300,000 civilians could be cut off as they were in the town of madaya, during a siege by the regime. More than 40 starved to death. Dalia al awqati that her charity, mercy corps, feeds and clothes half a Million People in Northern Syria each month. Its not much. No, but its essentially to keep a family alive. Reporter now theyre racing to get food parcels to families in aleppo city, fearing more starvation in a country thats already exhausted by a senseless and if syrias war wasnt complicated enough, today some americanbacked rebels told us they were attacked by kurdish fighters, who were also supported by the u. S. Now, the kurdish fighters say it wasnt deliberate, but, scott, this shows just how difficult it is for the u. S. To unite different faxes on the ground in syria. Holy williams, thanks. So, what can the u. S. Do to stop the war . For that we turn to margaret brennan. Margaret . Reporter well, today, the u. S. Is trying to broker an immediate ceasefire. Secretary kerry pushed russia and iran to stop attack in aleppo and let in aid to bee sieged areas. Vladimir putins military has cut off supply lines to the u. S. Backed rebels, and u. S. Officials warn that that strengthens both isis and assad little leverage in a war president obama has resisted getting involved in for five years now. Margaret brennan at the white house, thank you. Today cleveland mayor Frank Jackson apologized to the family of tamir rice after the city billed his estate 500 for ambulance services. The city also tore up the bill. In 2014 a cleveland cop shot rice who was 12. He was holding a gun that turned out to be a toy. He died the next day at the hospital. The officer was not charged. In a Big Development today, scientists have announced what may be mongs among the greatest discovery in the history of physics. They believe they found gravity waves predicted by einstein but two huge antennas, one in washington state, the other in louisiana, detected a gravity wave last september. When he described the universe as like a fabric, woven from the three dimensions, plus time. What physicist call space time. The gravity wave was set off sending a ripple through the air. So tiny one scientists saying the ripple consisted the entire Milky Way Galaxy about the width of a thumb, observing the fabric of the universe stretches and opens may open an entirely new understanding of nature. Coming up next how explosions like this are improving airport security. And a scoop by a newspaper sets off an uproar. Right back. Those who do should switch to geico because you could save hundreds on Car Insurance. Ah, perfect. Valet parking. Hello heres the keys. And, uh, go easy on my ride, mate. Hm, wouldnt mind some of that beef wellington. To see how much you could save on Car Insurance, go to geico. Com. Zah car alarm sounds its ok degree motionsense is the worlds first deodorant activated by movement. As you move, fragrance capsules burst to release extra freshness all day. Motionsense. Protection to keep you moving. Degree. It wont let you down. sounds of birds whistling introducing new ky touch gel cr me. For massage and intimacy. Every touch, gently intensified. A little touch is all it takes. More professional and effective force of airport screeners. Kris van cleave is in glenco, georgia, tonight at the tsas new Training Academy. Reporter seeing the power of even a small explosive made the threat real for nearly 200 soontobe airport screeners. Two, one. Reporter theyre going through a new Training Program here in georgia designed to Security Administration. A damning report by homeland securities Inspector General show screeners failed to detect 67 of 70 suspicious items brought through airport checkpoints. Peter neffenger became the Inspector General. Shawn weeksfreeman is one of the academy instructors. She was a Flight Attendant on panam flight 330 standing where the 737 was preparing to land in honolulu. When i talk to my class, i tell them, youre not here by accident. And i wasnt saved at that moment by accident because that threat in 1982 is todays threat still. Reporter the academy marks the first time all transportation Security Officers will have standardized training. Largely trained on the job at their home airport. The ig, if theyre going through checkpoints today with one of their teams trying to bring things that should be flagged, will those things be caught. I think well catch them today. Reporter all of them . I dont know. I sure hope we catch all of them. Reporter the students will work at this mock checkpoint. Its complete with all the equipment, scott, theyre going to use in the field. Thanks. A small Catholic University in maryland is in turmoil after a report that its president wanted to weed out struggling students quickly to improve the schools standing. Packing. Heres chip reid. Reporter ed egan was a professor at mt. St. Marys university in maryland. What would you normally be doing on a day like this . Id object campus today. Id be teaching my class on the first amendment. Reporter but on monday he was fired in a letter a School Official said he is per sona non grata and not welcome to visit the universitys campus because he violated his duty of loyalty to the school. It all began last month when the Student Newspaper reported that the School President simon newman wanted professors to identify struggling students in the first few weeks of school so out. Some faculty members resisted and the school paper reported hard for you because you think of the students as cuddly bunnies but you cant. You just have to drown the bunnies. Put a block to their heads. Many students and faculty were outraged. Its not just the words but its the plan that the words described. Reporter whats wrong with the plan . Weeding out students because we think they might not do well in order to make the numbers look better. Thats not mt. St. Marys. Reporter egan was the faculty adviser to the school paper and says hes being punished for accurate but embarrassing reporting by the students. You did not tell them what to write . No. I did not. Not in any way. Reporter they cant be manipulated. They are independent, strong, bright people. Reporter a petition protesting the firing of egan and another professor has been signed by about 7500 professors university declined our repeated our final story is written on the face of a young child, whose joy mere words cannot describe. Heres elaine quijano. Elsa had magical powers and could create things out of snow and ice. Reporter 4yearold Mattie Zapata cant get enough of her books on tape because the voice is her mothers, mandi balderas, locked in a prison four hours away. I tell her how i missed her. Even though im not there listening to my voice, spending time with me. Reporter each month while balderas and other selected inmates record a story and send it home. Its called storybook project and runs in six womens prisons across texas. It was a Sunny Afternoon at the end of may. This begins within the walls of a castle. We werent scared as long as we were together. Reporter 64 of incarcerated women nationwide lived with their children before prison. Storybook tries to ease the pain of separation. If you put your hand in mine, you feel love powers. Reporter mattie was 18 months old when her mother went to prison that killed the other driver, a crime of manslaughter that victimized her daughter, too. I cry for mommy. How come . Because i miss her. If it wasnt for the books, she wouldnt be able to have the bond that we have now. I know that means something to something to me. Reporter but the fact s you got behind the wheel of a car when you had alcohol in your system and a person is dead because of that. Didnt you forfeit your right to do things like this when you made that decision . Yes, i made a decision. But its not about the decision anymore. Its about how we handle the circumstances. Thats how im choosing to handle the sishs, by helping my kids the best i can from where im at. Hey, mattie, its me, mommy. Reporter balders has four sentence. When she finally reunites with her family, she hopes her children wont mistake her voice for a strangers. You are my sunshine, my only sunshine reporter elaine quijano, cbs news, columbus, texas. I love you always, mommy. And thats the overnight news for this friday. For some of you, the news continues. Later for the morning news and for cbs this morning. From the Broadcast Center in new york, im scott pelley. This is the cbs overnight news. Hello and welcome to the overnight news. The federal government is warning a possible shortages of test kits for the zika virus. The tests are designed to let pregnant women know if theyve been infected by the virus that can cause severe birth defects. The cdc is shipping test kits but admits there may not be enough to go around. The virus is mostly spread by mosquitos. Those in Southern States are especially vulnerable. And the cdc is warninging of a widespread outbreak in puerto rico. Getting pregnant are to avoid traveling to latin america, especially brazil. Brazil is hosting the summer olympics and that puts americas female athletes in a bind. Morgan in the box with that and theyre on the board. Reporter world class female athletes, including members of the u. S. Womens soccer team are raising safety concerns ahead of de janeiro janeiro. Earlier this week star player alex morgan called the virus a very scary thing and goalie hope solo saying its possible she might skip the games. All i can do is speak for myself. If the olympics were today, i wouldnt go. We have six months. We have a little time to figure things out. Our goal really is to protect pregnant women. Reporter the cdc says its working nonstop to gain control over the rapidly spreading virus. Suspected ties between the virus and the birth defect microcephaly appear to be on wednesday the cdc reported that zika was found in the brain tissue of two brazilian babies who died from microcephaly less than 24 hours after birth. The strongest evidence today that zika is the cause of microcephaly but its still not definitive. Reporter the new england journal of medicine cited a separate case. According to the report, a 25yearold woman living in slovenia chose to have an abortion after learning the child she was carrying had severe developmental abnormality abnormality. The woman who had been living in northern brazil showed zika symptoms during her pregnancy. Officials say the virus is spreading quickly because the aedes aegypti, which transmits the disease, is difficult to eradicate. The eggs can be droughtresist end and persist for some time. And it can bite four or five people in the course of one spread disease quite quickly. Reporter according to the cdc, a zika vaccine could be available by the end of 2017. Meanwhile, a group called catholics for choice is asking pope francis not to condemn contraception or abortion in order to protect the women. The department of Homeland Security is taking steps to ensure airport screeners are properly trained. For the first time the Transportation Security Administration will start training all screeners at one centralized academy, sort of a tsa boot camp. Glenco, georgia. This checkpoint is the centerpiece of the new tsa academy and the twoweek training course. This gross out of a top to bottom review done by the agency that found gaps in training and proficiency on equipment like this. The new Training Academy ames to change that. An explosive lesson on the screeners will be asked to help prevent. This is a explosive reporter the nearly 200 students assembled are some of the first to go through the new tsa Training Academy. Its controlled chaos. Its very difficult job. Reporter among those, 19yearold yasmin. Its a challenge but rewarding challenge. Reporter this is the First Time Since the agencys creation after 9 11 that the tsa has centralized training of newly hired trainers who make between 31,000 and 45,000 a year. Previously they were trained on the job at the airport they work. The academy opened in january as the tsa tries to recover from a series of highprofile embarrassments, including two officers allegedly groping passengers in denver and where screeners failed to cast 67 out Peter Neffenger took over aadministrator following that report. I tried to refocus on the mission. What is a screeners job is to ensure something that doesnt get past the checkpoint doesnt get past. Reporter do you think well catch all of them . I sure hope we catch all of thempy my tests show we have dramatically improved. Reporter can you show us your finding . I wont publicly because this goes to reporter im talking about the vast majority . The majority . Majority. Reporter for shawn weeksfreeman, the success of the screeners trained here. She was a Flight Attendant on panam in august of 1982 and a few row as way when a bomb went off on board. A 16yearold passenger died. Hurt. Tell them, youre not here by and i wasnt saved at that moment by accident. Todays threat still. Royal caribbeans anthem of the sea is undergoing repairs and inspection at a dock in nj nmg. The ship sailed into a massive storm last week on its way to florida and had to limp back to port. Passengers describe a terrifying trip and there are calls for a federal investigation into why the ship set sail in the first place. Reporting from cape liberty. Reporter this gives you some ship. Look at the size of this thing. That tells you something about the size of the storm that ran into that tossed this around like a paper cup. Last night passengers streamed off, some were cheering, some were kissing the ground. Who can blame them when you think about what they went through. Beatened, battered but hoim Royal Caribbeans anthem of the seas caped back into cape liberty last night. Free at last, free at last reporter putting an end to but as some of the 4500 passengers poured out of the stormdamaged cruise line. Awful. Reporter frustrations boiled over. We thought we were all going to die. The worst part was the fear and the lies because we were good shape. The reality is we shouldnt have set sail. 17 hours. Like a roller coaster you couldnt get off of and you werent strapped in. Reporter Royal Caribbean is facing criticism for Going Forward with the trips despite the forecast. A Senior Vice President with the cruise line says the strength of the storm caught them offguard. Would you say the captain ultimately made a mistake in deciding to go ahead with this voyage . If we knew that winds of 125mileanhour sustained were going to be in that yashgs we never would have gone. Theres no question about it. Reporter but after reviewing weather reports for the area, a former cruise line captain told us the ship never should have there really was absolutely no way that ship was going to avoid that storm pipts a miracle the injuries and damage were as minimal as it were. This could have been an absolute catastrophe. Polidents unique micro clean formula works in just 3 minutes, killing 99. 99 of odor causing bacteria. For a cleaner, fresher, brighter denture every day. Seriously . Where do you think youre going . To work, with you. Its taco tuesday. Youre not coming. I took mucinex to help get rid of my mucusy congestion. Oh, right then ill swing by in like 4 hours. Forget the tacos one pill lasts 12 hours. Im good all day. Wai