Able to fly across the country, taken down by secret service at the white house. Tax scam alert, thousands being fooled by callers claiming to be the irs and demanding money. Wait until you see what happens when we called back. And the fifth beatle is gone. We remember the man who turned a liverpool bar fan into beatle mania. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening a deadly storm city is punishing a dozen states from eastern texas to Southern Illinois with well over a foot of rain so far and a lot more to come. Texas, louisiana and arkansas are under flash flood warnings with the flood risks extending into mississippi and north into missouri and illinois. The Severe Weather has left at least two people dead. Its forced evacuations and left thousands without nbcs Janet Shamlian reports tonight from haughton, louisiana. Reporter a community under water tonight. In louisiana near lafayette, more than a foot of rain in a matter of hours. Most of it coming in the dark of night. Cassidy anderson says they were taken by surprise. Yeah, i mean, its scary because the water the water was a lot higher than it is now. Reporter more than 100 homes under water. Some submerged three or four feet. Most of the residents left here had to be rescued in the middle of the night. They were hoping to get back no their homes today and with the rain still coming down so hard theres no chance of that. Got it over here over the top. Reporter beyond louisiana potential flooding from texas to illinois. 22 Million People under flood watches, stretching 1,000 miles in. San antonio a s ool bus rounding a curve lost control and flipped. The rainslicked roads thought to be the cause. Adults escaped serious injury. Throughout the region downed trees have toppled power lines leaving 35,000 rout electricity, and the rain keeps coming. Taylortown, louisiana, recorded more than 14 inches. With more on the way. The fire chief says in a quarter saleofthecentury hes rarely steen this bad. We do not expect to have as much rain as we had, and without any time for it to drain off. Reporter doug ketchum and his brotherinlaw borrowed a boat to check out his neighbors. All were objection okay, but they lost two horses and a dozen goats in the fast rising waters. 1991 it did the exact same thing it is now. Reporter and just a short time ago, a new mandatory Evacuation Order was issued. This one for 3,500 homes here over fears one of the bayous would overtake its levee of, further devastating this community. Janet shamlian, thank you. Tonight donald trump is looking to take out his rivals for the republican for all after overcoming a barrage of attacks and scoring decisive victories in three of four states up for grabs last night and hillary clinton, hoping to turn her attention to trump, scored a landslide victory in mississippi, but Bernie Sanders pulled off the biggest shocker of the night in michigan. High drama on both sides. Lets start with nbcs Hallie Jackson on the gop campaign in miami. Hello, hallie. Reporter lester, good evening. Donald trump is racking up more delegates in a sign those establishment attacks arent working, not yet at least. His rivals best shot against trump happening in the next six days as we build towards showdowns in ohio and here in florida where 99 delegates are up for grabs, and tonight its trump looking most likely to take them home. Donald trump now ready for the final round to put this fight away. Thats the ultimate way of doing it. You knock them out. If you knock them out, nothing can happen. Reporter you want id rather go for a knockout. Reporter trump in one corner and in the or the movement to try to stop him. After months of silence the hits now coming harder and faster. Our nbc News Analysis shows 8. 35 million spent on ads against trump in florida alone. Thats where the frontrunner, after winning in michigan, mississippi and hawaii, celebrated his welldone Election Night with raw trump steaks, a more qvc than gop. We have the water. You have the steaks. You have the airline that i sold. I mean, whats wrong with selling . Every once in a while you can sell something. Reporter voters seem tock buying it. If trump wins in florida and ohio, hell have a clear path to the nomination. New polls show john kasich close in the buckeye state, but in florida trump is up 21 hover marco rubio who is brushing off vp talk now, struggling to show how he stays in. You are calling him a con artist. Im not running for im not looking to be anybodys president. I want to be president of the united states. Reporter rubios regrets, his insults. Trying to outtrump trump. You know what they say about men with small hands. Something im not entirely proud of. My kids were embarrassed and if i could do it again i would do it different. Reporter hes meeting with jeb bush and ted cruz and what looks like the establishments last gasp. Cruz picking up support from a familiar face, carly fiorina, all of them looking to stop the frontrunner but looking more unlikely to do it with just six days left. Hallie jackson, nbc news, miami. Reporter this is kristen welker. Senator Bernie Sanders pulling off a stunning upset in michigan. Weve now won i guess nine states, and a lot more are yet to come. Reporter today sanders telling Andrea Mitchell its a sign he can go the distance. Reporter the polls always have us very, very far behind until election day, and then we have won state margins. Reporter its been an unpry dictable year for pollsters. In michigan the High Percentage of independents threw off the polling. Sanders win so unexpected even he was caught off guard prompting this hastily arrange and late press event. The Political Revolution that we are talking about is strong in every part of the country. Reporter despite the upset, clinton has a substantial lead in delegates. Today the Clinton Campaign downplayed the loss, particularly after her big win in mississippi last night, looking ahead to next weeks battleground primaries. If you work for me and if you vote for me, i will work my heart out for you. Reporter but the loss in michigan underscores vulnerability. Democratic officials expressing concern clinton was so focused on pivoting to the general election her ground game faltered and more troublesome, her message failed to resonate with working class independent and younger voters. Sanders hammered clinton for supporting past trade deals. Exit polls show sanders beating of trade and that she is loss honest and trustworthy. Hopefully well have a good week next week. If we win ohio, nobody will remember it. Reporter sanders has a steep climb. He needs to win 60 of all remaining delegates to clinch the nomination, but he has the momentum and the money raking in millions from small donors. That will keep him in the race a lot longer than he might have otherwise been. Reporter according to our latest poll both clinton and sanders beat donald trump by double digits. Meanwhile, hours before tonights debate the rnc announced its filing a lawsuit over clintons emails, the Clinton Campaign calling that suit frivolous. Lester. Kristen, thanks, and facing so much pressure to win his home state marco rubios conversation with chuck todd for that town hall event in miami airs tonight at 8 00 eastern only on msnbc. An investigation is under way into the massive explosion that leveled several buildings in seattle and injured nine firefighters. They were on the scene checking out reports of a natural gas leak when the worst happened. Nbcs galledy schwartz has the details. Dispatch, may day, may day, may day. Reporter a frantic call over the emergency radio after a catastrophic blast. I have firefighters missing. Reporter followed by an incredible response. All members are accounted for. I do have two members that have injuries from flying debris. Reporter all tolled nine firefighters injured but all of them alive. Minutes earlier the firefighters had been searching for a gas leak near three businesses and now totally obliterated from a blast that sent debris and a some wave throughout the entire neighborhood. I woke up to a huge boom. I looked out the window, and my neighborhood exploded. Reporter the call originally came in at 1 00 in the morning after someone reported smelling natural gas. Firefighters responded, searching for the leak before an explosion so powerful it registered as an earthquake. This store surveillance video. We know as firefighters that this is a very dangerous job. Reporter each year natural gas explosions wreak havoc n. New jersey last year an explosion leveled this home and injured 15. In 2014 another explosion in harlem killed eight and injured more than 70, and in 2010 eight were killed and entire blocks leveled in a pipeline explosion that rocked san bruno, california. Today in greenwood, the neighborhood coffee shop, a Convenience Store and a restaurant are recognizable in the rubble. Complete disbelief that Something Like this would happen. Reporter but entire community, even children in the playground, are giving thanks that every firefighter survived. Tonight the seattle fire chief says all of those firefighters have been released from the hospital. They are shaken up, but they are in good spirits. He says all of them were completely decked out in protective gear and helmets and ultimately thats what kept them safe. Lester . Gadi schwartz, being raised after a fugitive wanted for the atemed murder of a pastor who led a prayer at a ted cruz rally was able to board a plane and fly across the country making his way all the way to the white house where he was taken down by secret service. Heres nbcs justice correspondent pete williams. Reporter the secret service searched the white house grounds today at the spot where police say an idaho man, kyle odom, tossed papers and a thumb drive over the fence last night. Hes charged with shooting a pastor outside a church in coeur dalene, idaho, sunday. The day before pastor Tim Remington gave the invocation at a ted cruz ral. A humble man that listens to god and listens to the people. Reporter police say after sundays shooting odom boarded a flight and made his way to washington despite an arrest warrant for attempted murder. A former Homeland Security official says the nofly list is not for wanted fugitives. The system was designed to prevent terrorists from getting on airplanes and protecting the Aviation System against terrorists. Find every criminal in the criminal database or every lookout that the National Law Enforcement community is looking for. Reporter even so tsa screeners who check ids are briefed before the shifts on priority of high priority fugitives and is based on prompt notice from police which did not come in. Odom has a history of mental problems. On his Facebook Page he said the world is ruled by an ancient civilization from mars and pastor tim is one of them and in another post he said president obama is aware martials are taking control of peoples minds. As pastor remington recovers from six gunshot wounds, his family is optimistic hes probably a little afraid, but his faith is stronger than anything else in his life, so hell pull through. Reporter odom appeared briefly in court today and was ordered held without bond while idaho police seek to get him back. Pete williams, nbc news, washington. Iraq have captured a chemical weapons expert for isis. Under interrogation hes reportedly revealed Key Information about isis chemical weapons and operations this. Detainee formerly worked for saddam husseins rejeempt defense Officials Say isis has already used artillery loaded with chlorine and mustard bowed ir. Thousands have begun paying their last respects to former first lady nancy reagan. She is lying in repose at her husbands president ial library in california through tomorrow. And tonight nbc news is hearing exclusively from her daughter patti davis about the legacy her mother leaves behind. Nbcs Andrea Mitchell has more. Reporter today nancy reagan began her final journey, her casket carried by her secret Service Detail past and present. Salutes as the hearse traveled the freeway, including one named for her husband, usually jammed. Today area Fire Departments paying tribute. And as the hear sze Library People gathering, some with red roses, nancy reagan red. Patti davis spoke with maria shriver, also a former california fliedy. Its really comforting to see all of these people who im sure are not all republicans. Reporter right. Standing out on freeway overpasses to pay their respects. Reporter and to your hand, oh, lord, we commend our sister nancy. Mrs. Reagan will lie in repose for two days as people pay their respects. Today including House Speaker paul ryan. The last years in declining health and without herrony were lonely. She told me once she was not afraid to die. She said i dont want it to hurt, but im not afraid to die. Ill see ronny again. Reporter now a threeday period of mourning. America on sunday lost a former first lady, but i lost my mother. Im happy for her that shes with my father. Reporter nancy reagan will be laid to herrony, finally at peace. Andrea mitchell, nbc news. Still ahead tonight, con artists posing as irs agents on the phone, tricking thousands into handing over money. We even caught one of the scammers in the act. Weve got an urgent warning for you tonight. Also, we took a chance on four lads from liverpool and the world was never the same. Remembering the man there is an urgent warning from the irs and fbi about a scam that thousands have fallen for, phone calls demanding money for taxes you dont owe. Its so widespread the irs place it had on a list of socalled dirty dozen tax frauds for this year. Nbcs Olivia Sterns met with one woman who cant escape the threatening phone calls. Final notice calling from the Internal Revenue service. Weve filed a lawsuit. Reporter so hes saying final notice and we have filed a lawsuit . Yes, its scary. Reporter thats the third call Gretchen Lindquist has gotten in just three weeks from someone pretending to be with the irs and demanding money. Its very upsetting, and then this morning, again, one more time, from a different phone number. I started to feel threatened by the repeat calls. Reporter luckily gretchen, an i. T. Analyst in the houston, is savvy calls are boeingus. 900,000 people have reported getting one of these calls, and the irs estimates 5,000 have paid up. The concern is that were just scratching the surface, that this is just the tip of the ice berks and even anecdote ally knowing people in this office have gotten calls, my father has gotten calls like this. Reporter this u. S. Attorney works to track down the people on the other end of the line. Last year he sent the ringleader of a massive irs Call Center Fraud to jail for 14 years. How hard is it to catch these guys . Its sometimes very difficult because you have people who are not necessarily in the united states. You have Shell Companies that are being used. Reporter the irs wants you to know that it will never contact you for the first time by phone, demand credit card information or threaten arrest. Gretchen and i decided to call one of the numbers back. How can i help you . You just called my friend and threatened her with a lawsuit claiming to be a federal agency. Gretchen though its no joke. I dont even want to answer the phone. Im about to get my cellular phone number changed. Reporter now if you do get a call like this the u. S. Attorney is asking that you please hang up the phone and report it to the fbi. Can you do so on the website or by phone, but, lester, no matter what, the most important thing is please do not give your Social Security number out over the phone. How about that reaction, its a prank, unbelievable. Thank you very much. Were back in a moment with an airline that delayed a flight on purpose so passengers these are my dogs dusty and cooper. I work for the dogs twentyfour seven. I am the butler. These dogs shed like crazy. Its like being inside of a snow globe. It takes an awful lot of time to keep the house clean. I dont know what to do. doorbell whats this . Swiffer sweeper and dusters. This is nice and easy boys. It really sticks to it. It fits in all the tight spaces. This is really great. Does that look familiar to you . Im no longer the butler, fact. Theres an advil specially made for fast relief that goes to work in minutes. The only advil with a rapid release formula for rapid relief of tough pain. Look for advil filmcoated in the white box relief doesnt get any faster than this. Advil. toilet flush if you need an opioid to manage your chronic pain, you may be sooo constipated it feels like everyone can go. Except you. Opioidinduced constipation, oic, is a different type of constipation, which may need a different approach. Longing for a change . Have the conversation with your doctor about oic, and ask about prescription going out for date night with your man is nice. But i think women would agree. Snuggling up after is kinda nice too. But heres the thing about half of men over 40 have some degree of erectile dysfunction. Well, viagra helps guys with ed get and keep an erection. Ask your doctor if your heart is healthy enough for sex. Do not take viagra if you take nitrates for chest pain or adempas for pulmonary hypertension. Your Blood Pressure could drop to an unsafe level. To avoid longterm injury, seek immediate medical help for an erection lasting more than four hours. Stop taking viagra and call your doctor right away if you experience a sudden decrease or loss in vision or hearing. Ask your doctor about viagra. Tis appointing news from doctors at the Cleveland Clinic who today said the nations first uterus transplant has failed. A 26yearold woman received a transplant two weeks ago and everything appeared to be going well until she encountered complications and the uterus had to be removed. The patient is recovering, and the hospital says it will continue to try more been successful in europe. Most of us in the u. S. Couldnt see last nights total Solar Eclipse with our own eyes, but passengers aboard one Alaska Airlines flight got the view from 37,000 feet over the pacific. About a dozen astronomers were on board to witness the very rare phenomenon. One of them got the airline to push the flight back 25 minutes so they would intercept it at the perfect time. Something they were pretty excited about all of that. When we come back, without him we might never have heard about the fab good news. Youre down with crestor. Alright now theres a way you can get crestor for 3. Adding crestor, along with diet, lowers bad cholesterol. Crestor is not for people with liver disease, or women who are nursing,pregnant, or may become pregnant. Tell your doctor all medicines you take. Call your doctor if you have muscle pain or weakness; feel unusually tired; have loss of appetite, upper belly pain, dark urine or yellowing of skin or eyes. These could be signs of serious side effects. Ask for the crestor 3 card. Ask your doctor i accept im not 22. I accept i do a shorter set these days. P i even accept i have a higher risk of stroke due to afib, a type of irregular heartbeat, tnot caused by a heart valve problem. But i wont play anything less than my best. So if theres Something Better than warfarin, im going for it. Eliquis. Reliquis reduced the risk of stroke better than warfarin, plus it had significantly less major bleeding than warfarin. Eliquis had both. Thats what i wanted to hear. Ndont stop taking eliquis unless your doctor tells you to, p as stopping increases your risk of having a stroke. Neliquis can cause serious and in rare cases fatal bleeding. Dont take eliquis if you have p an artificial heart valve or abnormal bleeding. R you may bruise more easily. Yo. And it may take longer than usual for any bleeding to stop. Nseek immediate medical care for sudden signs of bleeding, like unusual bruising. P eliquis may increase your bleeding risk if you take certain medicines. P tell your doctor about all planned medical or dental procedures. R i accept i dont play. Quite like i used to. But im still bringing my best. And going for eliquis. V reduced risk of stroke v plus less major bleeding. Ask your doctor. If switching. To eliquis is right for you. You owned your car for four years, you named it brad. You loved brad. And then you totaled him. Ryou two had been through everything together. Two boyfriends, three jobs. T youre like nothing can replace brad. Then Liberty Mutual calls, r and you break into your happy dance. If you sign up for better car replacement , well pay for a car thats a model year newer with 15,000 fewer miles than your old one. See Car Insurance in a whole new light. Finally tonight, a tribute to the man many will remember as the fifth beatle. George martin was a veteran of the royal navy with a background in Classical Music when in 1962 he met four moptopped unknowns who played rock n roll, and together they changed music and the world forever. Nbcs harry smith looks back. Reporter it was George Martin who signed the fab four to their first record contract. Please love me do reporter his Classical Music training lifted the a sensation. Martin was the one who sped up the tempo of please, please turning it into a number one hit. If i please you reporter can you even imagine yesterday without the accompanying spring quartet. Horns in sergeant pepper. Reporter all that accompanied the beatles musical adventures from india. Reporter to psychedelia. Lucy in the sky with diamonds reporter and if anyone deserved to be called the fifth beatle, it was George Martin, and it was he who brought the dramatic organizations to mccartneys bond theme. To live or let die reporter later on, martin helped elton john turn his candle in the wind into goodbye Englands Rose in tribute to princess diana. Too reporter martin was the guiding hand that nourished and encouraged the Creative Forces of the beatles considerable talents. Its entirely possible had it not been for George Martin none of us would have heard of them much less worshipped the beatles. Harry smith, nbc news, new york. And that will do it for us on a wednesday night. Im lester holt. For all of us at nbc news, thank you for watching and good Marcia Clarks toplessless photo scandal. Who leaked the pic of the famed o. J. Simpson prosecutor now on extra. Marcia clark topless. Why the o. J. Jury never saw the scandalous image and was its