Announcer from nbc news World Headquarters in new york this is nbc nightly news with lester holt. Good evening. We begin here with another one of those stories that reminds us isis is determined to inspire a terror attack on our soil. This one comes from massachusetts. A young man busted by the feds. They say he was inspired by isis and was hatching a plot to explode bombs in College Cafeterias. In this case the suspect was already on authorities radar. It turns out his father a police captain, sounded the alarm and turned him in. Our ron mott has details. Reporter federal officials in boston announced the arrest of 23yearold Alexander Ciccolo the son of Boston Police captain Robert Ciccolo ciccolo. A Police Source told nbc news captain ciccolo reported his son to the fbi after learning he was allegedly plotting an isisinspired attack. According to court documents, ciccolo goes by the name Ali Al Amriki and was arrested july 4th after receiving four guns from an undercover agent. The government says sick oel o. Was under investigation since last fall and shared plans to attack College Cafeterias including executions of students broadcast live on the internet. But Law EnforcementOfficials Say because he was under constant surveillance an attack was unlikely. Authorities dodged a bullet in this plot but the threat remains out there, remains wide remains strong and isis remains relentless in recruiting westerners for its cause. According to the fbi affidavit, agents found partially built molotov cocktails in ciccolos apartment. A Boston Police source tells nbc news that ciccolo and his father are estranged and that ciccolo suffers from mental illness. While being evaluated at the jail after his arrest Officials Say ciccolo stabbed a nurse in the head with a pen. This is the second highprofile isisrelated investigation to surface in i. C. E. In the past six weeks. In early june police shot and killed 26yearold Usaamah Rahim outside a bostonarea drugstore when they say he waved a knife at officers. Today ciccolos family issued a statement saying they were saddened and disappointed to learn of his intentions grateful authorities prevented any loss of life. Ciccolo is due in court tomorrow. Ron mott nbc news boston. Were going on 48 hours now, and no luck in the hunt for a notorious drug kingpin whose brazen and elaborate escape from a mexican prison has rattled Law Enforcement on both sides of the border. Joaquin El Chapo Guzman head of a powerful Mexican Drug Cartel has funneled billions of dollars of drugs into the u. S. Tonight a frantic search continues for him as we get a better sense of the complexity of the tunnel through which he made his escape. Nbcs mark potter is outside the prison in mexico. Mark, good evening. Reporter good evening, lester. The last time authorities here at the prison say they saw Joaquin Guzman was around 9 00 p. M. On saturday. Since then hes disappeared through a tunnel. And now that manhunt is widening. Once again the exploits of Joaquin Guzman are frustrating the Mexican Police and military. His nickname, el chapo, means shorty. But his legend is larger than life. For most of the day authorities were gathered at this nondescript rural house, the beginning of the milelong tunnel Authorities Say he used to exit the prison. From this Vantage Point its easy to appreciate just how long that tunnel is. This house is where the tunnel began. They dug down from here and then went out across that green field, way out there, past that tall tree on the right, and kept going to that complex of buildings, that gray wall out there. Thats the prison. And that is how far they had to go underground to reach Chapo Guzmans cell. By leaving through such an elaborate tunnel some suggest that guzman didnt escape from prison he checked out. And many suspect corruption was behind it. This is someone who can hire the best talent in the world. But he himself probably cant read and write. Reporter gouzman once appeared on the Forbes Magazine billionaires list. He is also believed to be powerful and violent. As the head of the notorious sinaloa drug cartel. His strategic wars that hes fought against the juarez cartel, the Tijuana Cartel and the zetas themselves and the gulf cartel have been the bloodiest battles that mexico has seen. Reporter to some, especially the poor he is seen as a benefactor celebrated in folk songs. Hes one of the alltime narco figures who would shower people with gifts, kind of a santa claus, robin hood role. Reporter today pictures surfaced on social media purporting to show guzman after his escape. They were reportedly supplied by his son. But one official told nbc he doubts chapos son would release any clues to his fathers whereabouts. Mark potter nbc news mexico city. This is pete williams. Its oddly fitting that Mexican Police say Joaquin Guzman used a tunnel to escape because its through tunnels that he began pouring Illegal Drugs from mexico into the u. S. Two decades ago. The first big one in arizona in the early 1990s. And then an even more sophisticated drug tunnel was found leading into california. U. S. Officials say at its height the drug cartel he ran was responsible for up to half of all the Illegal Drugs flowing into the u. S. Through mexico. Marijuana, methamphetamines and heroin and especially cocaine from central and south america. And raking in at least 3 billion a year. This is a national travesty and he needs to be caught. And the next time hes caught we need to send him to the state make sure hes here for good. Reporter in january authorities said his cartel played a major role in importing more than two tons of cocaine a month into chicago. Half sold there, the other half in the midwest, northeast, and parts of canada. Guzman has been indicted by grand juries in six states. And the u. S. A aggressively urged the Mexican Government to send him here to face charges in an american courtroom. Weve made quite clear to the mexicans our interest in ensuring that he faces justice here in the united states. Reporter other mexican drug figures sent here for trial have been convicted and sentenced to colorados Supermax Prison which is where current and former drug agents say Joaquin Guzman should be locked up. The d. E. A. Says its guzmans cartel that has worked hard to satisfy the demand for heroin now considered epidemic in the u. S. And his cousin will be sentenced later this year in New Hampshire after admitting that he planned to expand guzmans drug empire into new england. Lester. Pete williams tonight. Thank you. Turning overseas now, where there are signs that a nuclear deal with iran is imminent. After 20 months of heated negotiations and no fewer than four deadlines and three extensions. Nbcs chief Foreign Affairs correspondent Andrea Mitchell has the very latest tonight from vienna. Andrea, good evening. Whats happening there . Reporter good evening, lester. The ministers have now gotten together after midnight and are meeting. All signs now pointing to a deal within the next few hours. If the Draft Agreement is approved by president obama, by irans president rouhani, and the leaders of the other world powers. As the Foreign Ministers arrived this morning, they werent done. There were still some disputes to settle even as they hoped to make history. The grim faces around the table expressed the tension of the last 17 days. They had been here before getting close and failing to close the deal. Would it finally come together . The expressive shrug of europes representative Federica Mogherini said it all. By midday irans foreign minister zhavad zarif expressed it best. Irans president rue rouhani rouhanis office anticipating an announcement tweeted hashtag iran deal is a victory of diplomacy and Mutual Respect over the outdated paradigm of exclusion and coercion and this is a good beginning. But they had jumped the gun. So they deleted the tweet, then repoeted adding an if to hashtag iran deal. And the white house confirmed if necessary they would extend the midnight deadline a fourth time. Typically some of the more some of the most difficult issues are the ones that get kicked to the end end. Reporter the final hangup was real. Whether to lift a u. N. Arms embargo on iran and if so when. Despite u. S. Concerns that it would further inflame the region. The iranians are arming the Houthi Rebels in yemen. Theyre arming the Assad Government in syria. Theyre arming hezbollah in lebanon. And theyre arming hamas in gaza. They are a real problem. Reporter any change in that arms embargo is going to set off a fire storm in congress, in both parties in fact which is why even a deal agreed to tonight will require a major selling job back home for john kerry and importantly for the president. Lester . Andrea mitchell thank you. Greece may be saved by a deal that could stop the crisis that has made atms run dry in that country. Other european leaders have agreed to give greece a third bailout in exchange for some strict concessions, which is not sitting well with many of the greek people. Its not a done deal yet. Greek Parliament Still has to vote on it come wednesday. Were on alert this evening for the threat of tornadoes in the midwest. About 27 Million People potentially in the pathway of Severe Weather from a system that has already pounded the region with heavy rain and flooding. Nbcs al roker has the latest. Reporter a morning of destruction in parts of the midwest. Rain and powerful winds whipping through illinois uprooting trees, downing power lines. The same line of severe storms causing flooding and bringing down trees in wisconsin. We just had the tree trimmed, ripped the sidewalk right out. Reporter in one Central Indiana neighborhood people spending the day assessing damage after an overnight tornado whips through with 85mileperhour winds. And there was more Severe Weather in indiana today. Like a big wind tunnel. I mean you could just everything was blowing around. Reporter in kentucky several drivers had to be rescued yesterday from flooded roads. And a frightening scene in West Virginia. Residents there preparing for even more rain after flash flooding prompted dozens of evacuations. Vehicles were swept away. More than 40 people in the town of Mineral Wells had to be rescued from rooftops. Theres a lot of houses that were up to the windows or farther. Reporter boats trucks and humvees deployed to bring people and their pets to safety. And weve got heavy thunderstorms now moving through West Virginia at this hour. The northern half of illinois under a tornado watch until 11 00 central daylight time. Were also looking tonight for an area of enhanced severe storms. Moderate risk stretching from illinois all the way into parts of kentucky. 52 Million People at risk. Tornadoes possible. Strong winds, damaging winds. And that risk continues tomorrow from jackson, nashville all the way to the southeastern atlantic coast, lester. All right, al thanks very much. Now, its official. Wisconsin Governor Scott walker has jumped into the republican race for president. Hes the 15th gop candidate to announce but hes the one many have been waiting for. Now comes the real test. The ones that will determine if he earns his place in the top tier. Nbcs Kelly Odonnell has more on that. Reporter scott walkers supporters have plenty of practice turning out for him. Every days an outstanding day when youre a republican. Reporter three election victories in four years. Even beating back a 2012 recall. I love america. [ cheers ] reporter now the 47yearold with childhood roots in iowa says he is ready to be president. We need new fresh leadership. Leadership with big bold ideas from outside of washington. The kind of leadership that knows how to get things done. Reporter walker is a political animal. More than half his life spent in public office. Protesters camped at the state house. After walker stripped collective bargaining rights from public Union Workers in 2011. This year walker stumbled when he compared that fight to global terror threats. I can take on 100,000 protesters, i can do the same across the world. Reporter in a recordsized field with Donald Trumps combustible record on immigration was viciously and violently shot by an illegal immigrant. Reporter walker has flipped, rejecting a path to citizenship that he once supported. Its very clear to me. We need to secure the border. Reporter this harleyriding son of a baptist minister can appeal to tea party and social conservatives along with the establishment. Campaign adviser rick wiley. Hes one of the only candidates that can swim in all three of those lanes. Reporter and this is the walker kickoff. And despite his potentially broad appeal across different parts of the Republican Party as Governor Walker has no Foreign Policy experience and he has yet to be tested under the kind of scrutiny you get on the president ial level of politics. Those will be his challenges as he begins a weeklong rollout in four key states. Lester . Kelly odonnell there tonight. Thank you. Theres late word of a major shift for our Nations Armed forces. The pentagon announcing plans to end the ban on transgender troops in the military. The various branches will have six months to figure out the logistics of integrating transgendered Service Members beginning early next year. Theres a lot more to tell you about here on this monday. Still ahead, rivers of lava ash, and cinders raining down from the sky. A giant volcanic eruption forcing evacuations for miles around and the worst may be to come. Also will fans be disappointed now that another book fundamentally alters one of the best dads in American Literature . Will you be a sound sleeper, or a mouth breather. A mouth breather well, put on a breathe right strip and shut your mouth. Allergy medicines open your nose over time, but add a breathe right strip and pow it instantly opens your nose up to 38 more. So you can breathe and sleep. Add breathe right to your allergy medicine. Shut your mouth and sleep right. Breathe right and look for the calming scent of breathe right lavender in the sleep aisle. Bennys the oldest dog in the shelter. He needed help all day so i adopted him. When my back pain flared up, we both felt it. I tried tylenol but it was 6 pills a day. With aleve its just two pills, all day. Now im back aleve. All day strong. 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A volcano has been blasting lava and ash into the air since late last week blotting out the sky, and now there are warnings that it could explode even further out of control. Nbcs Miguel Almaguer has our report from the southern mexico state of colima. Reporter from miles away soot ash, and smoke is seen pouring from the mouth of mexi the explosions rattled the earth. Here they call it the volcano of fire. When falling debris suddenly turns day to night. Erupting thursday time lapse video shows the spectacular display of pulsating heat and lava, ash shooting up a mile and a half into the air. Miguel novato evacuated his ranch as he felt danger moving in. Its like a fireball rolling down the hill. The volcano was throwing fire through the air. I couldnt believe it. Tonight still smoldering for a fifth day the fire volcano is the most active and dangerous in mexico. No one killed here but the ash is becoming a health hazard. The mountains and hillsides surrounding the volcano used to be a lush green, especially during the summertime. Now it looks like a moonscape. The ash here several inc