Isis and the Boston Marathon bombers. Homeland security correspondent jeff pegues is working this developing story. Reporter according to investigators, 23yearold Alexander Ciccolo was arrested on july 4th with two rifles and two handguns. An f. B. I. Search of his home found two machetes, a long, curved knife and several partially constructed molotov cocktails. Court papers say he planned to use the cache of weapons in an isisinspired attack at a State University. Sources say ciccolos father, robert, a captain in the Boston Police department, alerted authorities last fall that his estranged son had a long history of Mental Illness and had become obsessed with islam. Then in late june, investigators say ciccolo told an f. B. I. Witness his attack at a State University would focus in the College Dorms and cafeteria and would include executions of students broadcast live via the internet. He asked the witness to get him firearms. Court papers say ciccolo praised the Boston Marathon bombers, and on july 3rd purchased a Pressure Cooker at a massachusetts walmart. The same type of device used in the marathon attacks. In a recorded conversation ciccolo called the recent terror attacks in tunisia awesome and said the gunman was impressive. And like so many other isisinspired extreme itself, he used social media to praise the terror group. In a statement tonight the suspects family thanked authorities for stepping in when they did and preventing loss of life but scott ciccolo did injure someone. Investigators say he stabbed and injured a nurse with a pen after his arrest. Pelley jeff pegues reporting from the washington muse room. Jeff, thanks very much. In another developing story chicago has named him public enemy number one. Forbes calls him one of the richest men in the world. Well tonight drug lord Joaquin El Chapo guzman has a new title fugitive after breaking out of a mexican prison for a second time. Heres omar villafranca. This small twofootwide hole in the ground was the exit guzman used for his great escape. Just before 9 00 p. M. Saturday, he stepped into the shower in his maximum security cell and never came out. According to Mexican Police, he climbed down a 30foot ladder to enter a fivefoottall escape tunnel complete with lighting and ventilation and a motorcycle on rails to carry digging equipment. It extended about a mile to a construction site south of the prison. When i heard the news, i was quite frankly shocked but yet not surprised. Reporter james din kin former head of hiewrlt investigations, is one of the americans who helped capture guzman in february of last year. While they have a lot of information about him, he also knows what information they have about him. So theyre back to the drawing board and starting from scratch in many ways. Reporter Guzmans Sinaloa cartel is the largest in mexico, worth about 3 billion. It controls almost half of the Illegal Drugs flowing from mexico to america from marijuana and cocaine to heroin and methamphetamines. Authorities attribute 10,000 murders to el chapos gang, hundreds of those in the u. S. Guzmans use of tunnels both as escape routes and to transport his drugs, is legendary. Very tight. Reporter Bill Whitaker took a tour of the complex system for 60 minutes. Guzman used one underneath a bathtub in a safe house just days before he was finally captured last year. As the Mexican Police and military continue their frantic search just across the border in laredo, texas county sheriff Martin Cuellar is on high alert today. We will not let him come on this side. If he does hes going to get arrested. Thats the bottom line. Reporter 30 prison guards, including the prisons director have been questioned about the escape. Scott, attorney general Loretta Lynch has spoke with mexican authorities and promised the full support of the u. S. To help catch guzman. Pelley omar, thank you very much. There are important developments tonight at the talks to limit Irans Nuclear program. Our state Department CorrespondentMargaret Brennan is in vienna. Margaret . Scott, heres what we know about the emerging deal. Irans Nuclear Program will be frozen for at least a decade. Iran will cut its number of centrifuges from 19,000 down to around 6,000 and if iran complies economic sanctions will be lifted. Now, the final 100page agreement has been held up by an argument over exactly when to peel back a ban on irans ability to purchase and sell weapons, including missiles. And were told that precisely how much access weapons inspecteddors will get to all suspect Nuclear Sites including military facility, is still under negotiation. Pelley many deadlines broken through, but a deal has never been closer. Margaret brennan at the talks for us tonight. Thank you margaret. Tonight severe storms are tearing through parts of ohio, kentucky and west virginia. Yesterday there were four tornadoes in minnesota. Thousands lost power. Bolt after bolt of lightning lit up the sky. Eric fisher is our chief meteorologist at our cbs station in boston, wbz. Eric, whats next . Well, scott weve been watching the storms all day long, very early this morning. They rumbled through the chicago area, pretty dramatic video. A couple lightning strikes right on top of the willis tower towering over the chicago skyline there. The other threat from these storm, the humid july atmosphere heavy rain and flash flooding. We saw that in woodstock virginia. Very quickly water stacking up and rolling through neighborhoods there. As we head into tonight watching a setup that has a lot of heat in the middle of the country. We have ridgerubbing storms over the northern end of all that heat. A lot of severe wind likely in these storms as they move off toward the south and east. We have tornado watches that include chicago. Severe thunderstorm watches further to the south and east. That will be the trend for these storms developing in illinois. They proved off to the south and east down into kentucky. Tomorrow that threat will move further east. Scott, all the while heat indices in the middle of the country up to 115 degrees. Eric fisher, wbz thanks, eric. Pelley tonight Wisconsin Governor Scott Walker is announcing that he will run for the republican president ial nomination. He may be late to the party. He moves near the head of the line. A recent poll shows him leading in iowa where the first votes will be cast next year. Dean reynolds has been covering walker for years. Reporter in his new Campaign Video scott walker explains why he thinks he stands out from the pack. In the republican field there are some who are good fighters. They havent won those battles. There are others who have won elections but havent consistently takennen on the big fight, ive showed i can do both. Reporter it has seemed as though walkers time in office has been one fight after another. He aroused huge opposition to limiting the Bargaining Power of unions but won the battle. In response the unions forced a recall, and he won that fight, too and became a republican hero. In all hes won election as governor three times in this traditionally democratic state. Voters are serious when they say they want their leaders to take on tough decisions. Reporter hes signed tougher voter i. D. Law rejected Medicaid Expansion under the Affordable Care act and is now pushing for a constitutional amendment to give states the right the ban samesex marriage. One potential foe took note of walkers candidacy, hillary clinton, today. Republican governors like scott walker have made their name stomping on workers rights. Reporter wisconsin ranked 35th in the nation in private sector job creation in walkers first term. His promise of 250,000 new jobs was about 50 off. Charles franklin of the Marquette Law School poll. First step right now is to win that republican until nation. And he seems to be zeroing in on the early primary electorate in the republican party. Reporter now walkers own words have occasionally got him into trouble, like the time he compared Union Protesters to isis terrorists. But tonight he has a very supportive crowd as he kicks off his campaign and prepares to head off to the important early voting states including iowa, which is vital the his hopes. Pelley Dean Reynolds at the walker announcement in waukesha. Dean, thanks very much. Today the boy scouts of America ExecutiveCommittee Voted Unanimously to end the nationwide ban on gay adult leaders. But individual scouting troops would still be allowed to make their own decision. Final approval is expected later this month. Today greece reached a preliminary deal with its creditors for its third financial bailout in five years. Greece would get 96 billion but the government had to agree to tax increases and pension cuts that voters rejected overwhelmingly just a week ago. Heres Holly Williams. Reporter greece has once again dodged bankruptcy, but at the cost of a humiliating backdown. Greeces radical leftwing Prime MinisterAlexis Tsipras had likened the terms imposed by foreign creditors to blackmail. But just days away from literally running out of money greece was forced to capitulate to another round of tax hikes and public spending cuts. And theres a new demand that it sell off stateowneds a owned assets worth 50 billion, including airports and a Power Company to help pay down greeces debt. Haris theoharis earns around 7 a day scavaging garbage. Do you feel that greeces foreign creditors now have too much power over your country . Whoever has money has power he told us. And since they have the money, nobody can stop them. A quarter of the greek workforce is unemployed. The countrys economy is in tatters. And its still very poor here. Its the very poor here who are suffering the most. Unfortunately this is not a good deal. Tax evasion costs the countrys economy up to 12 billion a year, but he Still Believes greeces creditors have been too harsh. Theyre actually pushing us to the limit. This is too much. We have to see each other as partners and we shouldnt face demands that are plainly wrong. Reporter greeces banks which have been shut for two weeks now, will probably stay closed for several days to come. And, scott though greeces mountain of debt will now be around 400 billion, it did not win any immediate debt relief from its creditors. Pelley Holly Williams outside parliament in athens for us tonight. Holly, thank you. Food is running short for many of the 11 Million People who have lost their homes in syria. After four years of civil war, more than 300,000 are dead. Some of the survivors are reaching the capital damascus, and Elizabeth Flores has a rare look. Reporter every ration card is a life line for families who escape with their lives from the fighting in western syria. They are relatively safe here in damascus but destitute. The u. N. World Food Programme gives them basic staples, but as International Donations dwindle, so do the rations. What used to be a months worth now has to last for two. And then theres water. The refugees forced to squat in unfinished buildings have none. So unicef works to bring them the minimum for washing and drinking, but its scarce. Rebel fighters who have seized syrias fresh water sources in the countryside sometimes turn off the taps. Atif deib is a civil engineer. Water is being used as a weapon of war. Yes. From time to time we have water from big cities like aleppo, damascus, daraa. Reporter there are so many internal refugees that damascus is overflowing. How many of the people in this crowd are refugees . Some can afford a room in one of the citys cheap hotels. Others are on the streets. Fighting drove barcel msheinish from his home three years ago along with his 80yearold father ahmad, who was once a doorman at the damascus sheraton hotel. Hello, ahmad. Im elizabeth. Where are you living now . Now here. Report ahmad lost his place in an overcrowded hostel. Now, like so many others he sleeps in the park on a square cardboard. Im sorry. Crushed by a war he didnt ask for and is powerless to stop. Elizabeth palmer, cbs news, damascus. Pelley an accidental discovery has led to a new test for cancer. And what filled the eyes of a child with joy . Well show you when the cbs evening news continues. When i started at the shelter, i noticed benny right away. I just had to adopt him. Hes older so he needs my help all day. When my back pain flared up we both felt it i took tylenol at first but i had to take 6 pills to get through the day. Then my friend said try aleve. Just two pills, all day. And now, im back for my best bud aleve. All day strong and try aleve pm now with an easy open cap. My heart. Beats 100,000 times a day sending oxygen to my muscles. Again so i can lift even the most demanding weights. Take care of all your most important parts with centrum. Now with our most vitamin d three ever. And the wolf was huffing and puffing. Kind of like you sometimes, grandpa. Well, when you have copd it can be hard to breathe. It can be hard to get air out, which can make it hard to get air in. So i talked to my doctor. She said. Doctor symbicort could help you breathe better, starting within 5 minutes. Symbicort doesnt replace a rescue inhaler for sudden symptoms. Symbicort helps provide significant improvement of your lung function. Symbicort is for copd, including chronic bronchitis and emphysema. It should not be taken more than twice a day. Symbicort contains formoterol. Medicines like formoterol increase the risk of death from asthma problems. Symbicort may increase your risk of lung infections osteoporosis, and some eye problems. You should tell your doctor if you have a heart condition or high Blood Pressure before taking it. Grandfather symbicort could mean a day with better breathing. Watch out, piggies child giggles doctor symbicort. Breathe better starting within 5 minutes. Call or go online to learn more about a free prescription offer. If you cant afford your medication, astrazeneca may be able to help. Pelley in a surprising study out today, research, say they have detected cancer with a blood test. Dr. Jon lapook says the discovery was an accident. Reporter anesthesiologist dr. Eunice lee was 40 years old when she got pregnant with her second child. She had a blood test to check the fetus for genetic defects like down syndrome. But what surprised lee and her doctors was that the test suggested a major illness not in her unborn child but in her. There was evidence of cancer. Youre a patient at this point but youre also a physician. Was there a little battle between the two . The physician side of me was very sceptical. Reporter what about the patient side . The patient side of me was freaking out. This is the cancer right here. Reporter there was a large tumor in her colon. She was 15 weeks pregnant when thing cancer was surgically removed with no signs of spread. The test analyzes fetal d. N. A. Fragments circulating in the masters blood. But it also picks up the mothers d. N. A. Todays study found ten cases of cancer in the mother out of 125,000 fetal tests. Dr. Diane bianchi of Tufts Medical Center is the studys coauthor and a consultant for one of the lab companies. If theres cancer, the tumor is shedding d. N. A. Into the mothers blood, as well. And that is what is accounting for this imbalance. Reporter sevenmonthold baby ben is now healthy and happy. So is his mother. Im sure i would have been diagnosed eventually, but i might not have been diagnosed until, say the cancer spread to my lymph nodes. Reporter so getting pregnant the second time charles rivered a new life into the world, but it may also have saved you life . It probably saved my life. Reporter scott, this is the kind of accidental discovery that can lead to a major advance. Right now this type of genetic testing is not ready for widespread Cancer Screening but as technology improves, this approach may well become a way of screening for many types of cancer with a simple blood test. Pelley jon thanks very much. Coming next, closing in on a mysterious world. Guess what your Insurance Company will only give you 37thousand to replace it. Depreciation they claim. How can my car depreciate before its first oil change . You ask. Maybe the better question is why do you have that Insurance Company . With Liberty Mutual new car replacement, well replace the full value of your car. See Car Insurance in a whole new light. Liberty mutual insurance. If you have moderate to severe Rheumatoid Arthritis like me. And youre talking to a rheumatologist about a biologic this is humira. This is humira helping to relieve my pain and protect my joints from further damage. This is humira helping me reach for more. Doctors have been prescribing humira for more than 10 years. Humira works for many adults. It targets and helps to block a specific source of inflammation that contrubutes to ra symptoms. Humira can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal infections and cancers including lymphoma have happened, as have blood liver and nervous system problems, serious allergic reactions and new or worsening heart failure. Before treatment get tested for tb. Tell your doctor if youve been to areas where certain fungal infections are common, and if youve had tb hepatitis b, are prone to infections, or have flulike symptoms or sores. Dont start humira if you have an infection. Talk to your doctor and visit humira. Com this is humira at work. Shopping online. Is as easy as it gets. Wouldnt it be great if hiring plumbers carpenters and even piano tuners. Were just as simple . Thanks to angies list now it is. Start shopping online. From a list of top rated providers. Visit angieslist. Com today. [music] jackies heart attack didnt come with a warning. Today her doctor has her on a bayer aspirin regimen to help reduce the risk of another one. If youve had a heart attack be sure to talk to your doctor before you begin an aspirin regimen. Pelley mankind is meeting a neighbor its never met before. Tomorrow nasas new horizon space probe will reach pluto which has been nothing but a fuzzy dot since its discovery in 1930. A photo on sunday when new horizons was a million and a half miles away shows cliffs a mass of dark terrain and an icecap. Tomorrow it will be within 8000 miles. And on wednesday well have the first closeups right here. In ohio, this world came into focus for a farsighted baby. Tenmonthold piper didnt want the glasses, but when she saw her parents clearly for the first time, her reaction was priceless. Its had 20 million views online. Next harper lees new novel why some fans wont read it. Fact. Advil is not only strong its gentle on your body too. No wonder doctors and patients have trusted advil. For their tough pains for over 30 years. Relief doesnt get any better than this. Advil. Theres something out there. That can be serious, even fatal to infants. Its whooping cough, and people can spread it without knowing it. Understand the danger your new grandchild faces. Talk to your doctor or pharmacist about a whooping cough vaccination today. When Kevin Jorgeson needs light, he trusts only duracell quantum because it lasts longer in 99 of devices. My constipation and belly pain have my stomach feeling all knotted up. Ive tried laxatives. But my symptoms keep returning. My constipation feels like a pile of bricks. That keeps coming back. Linzess can help. Oncedaily linzess treats adults with ibs with constipation or chronic constipation. Linzess is thought to help calm painsensing nerves and accelerate bowel movements. Linzess helps you proactively manage your symptoms. Do not give linzess to children under 6 and it should not be given to children 6 to 17. It may harm them. Dont take linzess if you have a bowel blockage. Get immediate help if you develop unusual or severe stomach pain especially with bloody or black stools. The most common side effect is diarrhea, sometimes severe. If its severe, stop taking linzess and call your doctor right away. Other side effects include gas, stomacharea pain and swelling. Bottom line, ask your doctor about linzess today. Pelley harper lees longawaited second novel will be out in a few hours. The title comes from this line in the bible go set a watchman and let him report what he sees. Lees watchman is the hero of to kill a mockingbird, but spoiler alert, hes a hero no more. Heres michelle miller. Reporter as book sellers prepare for the midnight release of go set a watchman, fans of harper lees first work, to kill a mockingbird, are shocked. I dont want to read the book. Reporter on twitter, theyre saying, i just cant deal with the idea of a racist finch. The Atticus Atticus finch we know is now a very different man. Played by gregory peck in the movie, finch defends a black man wrongly accused of rape. Atticus finch is considered one of the greatest literary heros in history but now in watchman, a bombshell revealed by his daughter, a grownup scout, 20 years later, Atticus Finch is a segregationist with ties to the ku klux klan. Aty cuss broke scouts hart. Hes breaking all our hearts. Reporter remember that lee, an alabama native, wrote watchman before to kill a mocking bird was asked to revive it, and in so doing made Atticus Finch a more palatable heroic character. He was a symbol for so many point wheel of what is possible, of a course that was different but in the end was that a good thing . Did that just allow us to feel good about ourselves without putting anything on the line . Reporter mcwhorten says this book shows he was a complicated figure more reflective of the era in which he lived. We tend the look at these issues as good versus evil. Atticus was not evil. He was totally normal for his time. He was acting just like everybody else. Reporter the success of the book wont be determined for some time, but the new Atticus Finch may forever change the way we read a beloved american classic. Michelle miller, cbs news, new york. Pelley and thats the cbs evening news for tonight. For all of us at cbs news all around the world, good night. Captioning sponsored by cbs captioned by Media Access Group at wgbh access. Wgbh. Org ben affleck front and center at comiccon. Same with harrison ford. Both making news, but why is harrison flying again . And why is ben wearing his wedding band was it only for the cameras as ex jen keeps hers on too. The batman. Ben affleck. Ben and the magic ring at comiccon. On for the press. Dissipates for the fans. Jen also snapped with her wedding band on. And harrison in a flight after his plane crash. Are you feeling good, are you feeling okay . Exclusive. Jenny garths wedding. Farmhouse i dos with 90210 costar. This is a doover. Who claimed George Michael was addicted to crack . And backstage at miss usa