Devastating Drought Forces homeowners to dramatically cut back. 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 lot of us got that uneasy feeling today when within hours of each other separate computer outages grounded all United Airlines flights and halted trading on the new york Stock Exchange. It turns out they were unrelated glitches but they quickly got the attention of Homeland Security officials who determined there was no cyber attack. And while that gave us a reason to breathe easier it didnt make the day any better for grounded and delayed passengers or stock traders. And it reminded us all once again of what a razorthin digital threat we all hang by. We have two reports. First Stephanie Gosk on the Stock Exchange breakdown. Stephanie, good evening. Reporter good evening, lester. Well the new york Stock Exchange is one of the worlds largest. So when something goes wrong here on wall street the country and the world take notice. And today the exchange came to i agrinding halt for hours. When the opening balance rang this morning the biggest concern was the chinese market. But that would change. Ive never seen this happen. Reporter at 11 32 without warning the new york Stock Exchange shut down. What im trying to figure out, i dont have the answer is exactly whats causing 24 glitch. Reporter traders were stunned. There was a collective gasp. It was a collective gasp. And traders started running around, talking to each other, clearly on the hunt for the information theyd just lost. Reporter no access to stock prices. 700,000 orders stopped in their tracks. At 12 09 nyse tweeted, were experiencing a technical issue that were working to resolve as quickly as possible. But on a day when the Computer System for a major u. S. Airline shut down there was early concern that this may be a largescale cyberattack. Theres no indication that malicious actors are involved in these technology issues. Reporter while terrorism is ruled out, the cause is still unknown. An overnight upgrade of the Software System may have played a part. Todays abrupt shutdown is not unprecedented, but its rare. In 2013 the Nasdaq Exchange went black for three hours because of a technical glitch. At 3 10 the nyse was back up and running. No one lost money, and trade had continued on other exchanges. Does this have a knock on peoples confidence in the system . This was an inconvenience here at the new york Stock Exchange. But because of quick thinking as far as i know no clients were hurt and nobody suffered a big loss. Reporter but what may be damaged is the powerful system of wall street. Zblats black eye. Its embarrassing. Its not what you want to see from the face of capitalism which this place is around the world. Reporter for nearly four hours on wall street today no one was feeling very bullish. Stephanie gosk nbc news new york. Reporter this is tom costello in washington. From the crowded runways at l. A. X. All the way crosscountry to the ramp at newark. What was frustrating was on the united website they didnt have any information about the delay. Reporter to the gates at chicago ohare where at 9 00 a. M. Not a single plane was backing out. They cant even tell us when our flights leaving, so we have to head through security now. Hope for the best. Reporter the morning rush went nowhere fast for tens of thousands of united passengers after the nations second Biggest Airline suffered yet another computer glitch. The Ripple Effect stretching to curbside in los angeles to miserably long lines in denver minneapolis, and houston. Basically, the late flights are going to keep us from getting to some very important meetings we were hoping to make. Reporter it all started just after 8 00 a. M. Eastern. United says a computer router failed taking out flight scheduling and passenger checkin systems. That led toon faa ground stop for all United Airlines flights nationwide until 10 00 a. M. The good news it happened on wednesday, one of the slowest travel days of the week. The bad news its the height of the Summer Vacation season. Its always frustrating when theres a delay because we have our vacation planned and travel and stuff like that. Reporter in all, says united more than 800 flight delays roughly 60 united and United Express flights canceled. Just the latest disruption caused by computer glitches since united merged with continental in 2010. The most recent on june 2nd affected 150 flights. You have redundancy double redundancy triple redundancy. These kind of things just cant happen in a 24 by 7 fulltime system that basically has to be on all the time. Reporter United Airlines says its confident this was not the work of hackers, rather it was a failure with a router, that critical component to the Computer System, and it says this was completely unrelated to what happened at the new york Stock Exchange. Lester . . Tom costello tonight. Thanks. Now to the interview that has so many people talking this evening. Donald trump surging in republican primary polls even as he loses business deals. Trump doubling down today in an interview with nbcs katy tur, backing up his comments that have sparked so much controversy. We are taking mexicos problems. Mexico is beating us on trade, and theyre beating us at the border. But mexico doesnt want to take these people. So what do they do . They send them to our stupid politicians and we have sanctuary cities and we have all of this nonsense. Ive been saying this for a long time katy and its a disgrace. And frankly, if i didnt bring it up you wouldnt even be talking about immigration right now. When was the last time you were at the border . Ive been to the border probably three or four times over the years. And i have many people that live around the area. Im going to arizona this weekend where they want to talk to me because arizona is in some ways im the most popular person in arizona because of my stance. And im going to be but when was the last time that you were there . Probably three years ago. So how do you if you havent been there in three years, how do you know that it is such a problem . Because i know it was bad then and its worse now. It was terrible then, and its worse now. Its worse now than its ever been. You dont even have a border. People are just flowing through like water. Theres no border right now. And were taking them and putting them in our jails and our hospitals and were paying them money through different sources. Its a disgrace. Do you think and by the way, im not i have great relationship with the mexican people. I have many people working for me you can look at the job in washington i have many legal immigrants working for me many come from mexico they love me and i love them. And if i get the nomination i will win the latino vote. I will win it because im going to create jobs. Youre for the second amendment. Do you have a gun . I have a license to have a gun, yes, i do. Do you own one . Yes, i do. Do you use it . Gun range . Its none of your business. Its really none of your business. I have a license to have a gun. Zbln control gun control. What are you asking stronger background excuse me. Yes, i have a gun and yes, i have a permit to have a gun. Stronger background checks. What about that . Is there any step that you would take to make it harder to get a gun in this country . The problem is once you get into that you start getting into a situation, the slippery slope where all of a sudden youre going to really violate the second amendment. Do you have a plan for isis . I do have a plan. What is it . With isis you kill them at the head. You take the oil. Thats where theyre getting their money. If you bomb the hell out of it you bomb the hell out of it. Youve got to stop their wealth. They have tremendous wealth. What about snichbz civilians . Im talking about oil. What do you think of hillary if she wins the nomination . I think hillary would be a terrible president. She was the worst secretary of state in the history of our nation. Why would she be a good president . Jeb bush will never take us to the promised land. He doesnt have it. Hillary will never take us to the promised land. Hillary will be a disaster as a president. We need somebody that can make great deals with china, with japan, with mexico. We need somebody that really understands and cherishes the military. I actually think ill be the jobs president , but i actually think ill be even better in terms of the military. I will create military where nobodys going to mess around with the united states. Katy tur along with chuck todd here with us. Katy hes still suffering fallout with his business dealings over all this. Celebrity Chef Jose Andres has backed out of opening a restaurant in trumps d. C. Hotel, and Nevada Republican senator dean heller says he will be giving back the Campaign Contributions that trump gave to him and giving them to charity instead. And chuck, he said in that interview that we wouldnt be talking about immigration if it werent for him. Is he right . Hes 100 right. Okay lets put that on the table. We are having a conversation on immigration. Not a great one. Not the most substantive one. But yes, were having one because of him and what hes brought to this campaign. And i think another part of this that we cant ignore is that there is a chunk of the american electorate hes speaking for. This is a chunk of the american electorate that does feel left behind. The middle class part of the country that feels as if the middle class isnt the best place to go rise up. And they dont know who to blame. They blame some of washington. They blame some of wall street. So trump is channeling that anger. Hes doing it inaccurately. Hes believing every Conspiracy Theory and fact that he finds on the internet and not the ones that are straightforward. But the sentiment is one that people i think are connecting with. So we cant ignore whos following him. He may flame out, as i said before and i expect him to but theres still a chunk of voters who believe this. By the way, his comments on Hillary Clinton will shock i think some people today because at one time he praised her job as secretary of state and hes been a big supporter of the clintons in the past. I think thats going to get him in trouble. Thats not praise we heard a moment ago. No its not. And thats how republicans might try town do phim. Chuck and katy thanks very much. We have posted katys entire interview with donald trump on our website. You can find the full conversation on nbcnews. Com. Theres other news to tell you about. A new twist in a murder case thats become a flash point in the fight against immigration. Authorities have traced the gun that an undocumented immigrant allegedly used in the shooting of a woman on a San Francisco pier. And sources say it came from a very surprising place. Nbcs Hallie Jackson with more on that for us. Reporter the gun that killed 32yearold kate steinle originally belonged to a federal agent with the bureau of land management. The weapon stolen from his car according to the agency. Prosecutors say that gun ended up in the hands of Juan FranciscoLopez Sanchez, who has pleaded not guilty to shooting steinle, raising questions about why the mexican immigrant was allowed to walk free in San Francisco in the first place. After drug convictions in washington and oregon federal immigration officials deported Lopez Sanchez five times. Each time he returned to the u. S. Within weeks. Twice to arizona and twice more to texas. Arrested there as recently as 2009. He was released from a bay area jail this spring but San Francisco officials never notified i. C. E. They dont have to. San franciscos considered a sanctuary city, along with more than 7 0 other municipalities nationwide including new york and philadelphia. Places that generally dont get involved with federal Immigration Law unless theres a legal reason. These sanctuary city policies were designed to help promote Public Safety but in fact they undermine it because they make life less safe in the immigrant community where convicted criminals cause harm to all members of the community. Reporter but supporters of sanctuary laws say they create better relationships between Law Enforcement and immigrant communities. Local government is not in the deportation business. Would you go back and do anything differently knowing you that know now . I would. What . I would go right downtown to i. C. E. s door and tell them to do their job. I. C. E. Says they did as a seemingly random shooting shines a spotlight on what some call a broken system. Hallie jackson nbc news San Francisco. Baltimores Police CommissionerAnthony Batts has been fired 2 1 2 months after the the riots overt death of freddie gray. The mayor announced that batts is out just hours after the police union released a scathing report on the depending handling of the riots back in april. Gray died earlier that month from injuries he received while in police custody. We are getting an incredible look this evening at the exact moment a flash flood hit. The terrain is dry one second. The next its covered in a deluge of Rushing Water and debris after a severe storm. The destructive power captured on video in utahs johnson canyon. Weve got a lot more to tell you about tonight. Magnum p. I. Allegedly caught by a reallife private eye. Tom selleck accused of stealing water to use at his california ranch. An uproar amid this drought emergency as millions are forced to cut back. And later, hello mudda, hello mafadda, letters from camp going viral. Laughter and tears far from home for the summer. Our cloud can keep them safe and accessible anywhere. My drivers dont have time to fill out forms. Tablets. Keep them all digital. Were looking to double our deliveries. Our fleet apps will find the fastest route. Oh, and your boysenberyy apple scones smell about done. Ahh, youre good. I like to bake. With at t get up to 400 dollars in total savings on tools to manage your business. Woman as much as i sweat, i always wore black. Other clinical antiperspirants didnt work. Then i tried certain dri. Its different. It stops sweat before it starts. Add some color to your life with certain dri. 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Like little support elfs are just holding you. I can sleep now through the night vo change your sleep. Change your life. Change to tempurpedic. Were back now with the uproar involving a hollywood star. Actor tom selleck accused of stealing truckloads of public water, having it brought to his estate during the middle of californias historic drought, when so many other people are being forced to cut back. The highprofile figure the latest face of socalled water shaming. Our National CorrespondentMiguel Almaguer reports. Reporter actor tom selleck may be in hot water, according to a lawsuit a truck routinely hauled water from this hydrant eight miles away from his home onto the actors 60acre ranch. I can explain reporter the magnum p. I. Star isnt talking and hasnt responded to our requests for comments. In Court Documents the calleguas claims a water truck repeatedly 257d water from a hydrant for 18 months. During one week alone the truck observed making seven trips into and four trips out of the Hidden Valley area where the selleck property is located. Selleck is being sued for 21,000, the cost of the investigation. The Water District is also asking selleck to cease and desist, to stop taking water. The sheriff tells us he faces no criminal charges. Its really about doing the right thing and preserving our water supply for our users. Reporter with water reserves dwindling across the state the public is doing its part. Water use slashed by 29 in may. The Mormon Temple in los angeles letting its nearly 100,000squarefoot lawn go brown. Were picking up the pace. Water conservation is setting in. But were not there yet. And we have to keep at it. Reporter socalled drought shaming, neighbors reporting neighbors for water waste. Do you really need to do that in the middle of a drought . Reporter has become a trend as Water Companies threaten fines. Tonight its sellecks turn. After the Water Company hired a p. Eye to catch magnum p. I. Miguel almaguer nbc news los angeles. Were back in a moment with the lengths some are going to to keep the Confederate Flag flying in South Carolina. Heart healths important. So you may. Take an omega3 supplement. But its the ingredients inside that really matter for heart health. New bayer pro ultra omega3 has two times the concentration of epa and dha as the leading omega3 supplement. New bayer pro ultra omega3. [ starter ] ready [ starting gun goes off ] [ male announcer ] over time youve come to realize. Its less of a race. And more of a journey. So carry on. With an aarp Medicare Supplement insurance plan. Insured by unitedhealthcare insurance company. Go long. Caring for someone with alzheimers means i am a lot of things. I am her best friend. I am her ally. So i asked about adding oncedaily namenda xr to her Current Treatment for moderate to severe alzheimers. It works differently. 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Dozens of them in fact as a state legislator from a rural upstate community launched an effort to kill a bill. Nbcs ron allen has more. Representative pitts is recognized on the amendment. Reporter representative mike pitts is virtually a oneman wrecking crew in the South Carolina house. Offering amendment after amendment, at least 25 and still counting dominating the emotional debate about a bill that would remove the Confederate Flag from the state house grounds. Yellow jasmine has a good smell. Reporter he wants a bed of state flowers planted if the flag and its pole are removed. Or a granite monument with the flag cast in bronze. Or the flag in a glass case. What his critics call filibuster by amendment. Clearly youre trying to thwart is this process. No. I am trying to reach a compromise and find one amendment that can do that. Reporter he hails from a Rural Community in upstate South Carolina a manufacturing and farming hub. Why is this flag so important to you . I grew up with that flag. The current flag. Being almost a symbol of reverence because of my familys service in that war. It was not a racial issue. Are you concerned that youre on the wrong side of history now . No i am not. I would like the heritage that i represent also respected in the process. Its that simple. Reporter the debate went on for hours with a number of other defenders of the flag adding their voices. All this continues on thursday. Most observers expect the bill will eventually pass with the flag coming down perhaps by the end of the week. Ron allen, nbc news columbia South Carolina. A moving moment from the popes eightday visit to south america. An elderly woman in a wheelchair was lifted up to greet pope francis, who kissed her during his swing through ecuador. Before he departed that country today a dad brought his son up to say goodbye. The little boy will never remember it because he was asleep the whole time. The popes tour now continues to bolivia, where he received a warm welcome despite the chilly weather. When we come back, kids saying the darnedest things. The gems from campers practicing the lost art of letter writing. Of letter writing. Nobody told me to expect it. Intercourse thats painful due to menopausal changes. Its not likely to go away on its own. So lets do something about it. Premarin vaginal cream can help. It provides estrogens to help rebuild vaginal tissue and make intercourse more comfortable. Premarin vaginal cream treats vaginal changes due to menopause and moderatetosevere painful intercourse caused by these changes. Dont use it if youve had unusual vaginal bleeding breast or uterine cancer, blood clots, liver problems, stroke or heart attack, are allergic to any of its ingredients or think youre pregnant. Side effects may include headache, pelvic pain, breast pain, vaginal bleeding and vaginitis. 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Dear family, i must write you a letter even though nothing important has happened. Reporter lifes lesson of the day no pain no gain. Often funny, sometimes even a tad dramatic. One camper writes i want to go home now. These wet spots are my tears. We caught up with doug and joanna goldoff whose two children write every other day. I love you. I miss you. Youre da best. Reporter 12yearold zachary and 9yearold danielle are away at camp for the second week. Oh, mommy, i cried five times already. You know, it kind of pulls at your heart a little bit. But then the next letter is im having the best time ever. Reporter we were there when they received a letter. To whom it may concern. Im not going to lie. This is a little anticlimactic. Reporter its nice to know some things havent changed. To see them actually writing the way we used to which was the norm is actually nice to see. Reporter letters from summer camp. Sure to become precious family mementos and reading them over and over never gets old. Rehema ellis, nbc news roslyn new york. Absolutely priceless. Thats going to do it for us on a wednesday night. Im lester holt. For all of us at nbc news, thank you for watching, and good night. She is staying alive in her own way. So is suddenly single scott. Im billy bush and what just brought ben and jen together again . Whats