Could there be an announcement in the next 48 hours . Torn apart. Dramatic video as a it should lifts a barn high into the hair in minnesota. One of several twisters cutting a path of destruction all across that state. And, its a pokemon world and were just living in it. Why these little guys are suddenly popping up everywhere. And we do mean everywhere. The hottest new app thats driving america to distraction today, tuesday, july 12th, 2016. Announcer from nbc news, this is today with matt lauer and savannah guthrie. Live from studio 1a in rockefeller plaza. Morning, everybody. Welcome to today on a tuesday morning. Matt is back from his vacation. I heard you just were chasing pokemon all around the yard. I can say that i was just on vacation for a week with my kids and dare i say which , i dont theyre into this yet. They are now. It is a huge story. Yes. Everyones chasing pokemon. I mean al is busy right now trying to get one here we go. Okay. I hope youll be ready for the weather, al. Well check back in, al. Okay. Dont bother me. This ones lost on us old people. Well get to more on that in a moment. But to our top story, president obama heading to dallas today to try to help that city heal after last weeks attack on police. Hell be joined by Vice President biden and former president george w. Bush. Nbcs Gabe Gutierrez is in dallas. Gabe, good morning to you. Reporter savannah, good morning. President obama once again having to assume the role of consoler in chief. This will be the 11th time during his presidency that hes tried to comfort a city after a mass shooting. And this as were learning more about the gunman from his parents. Micah johnsons parents say that he seemed like a different person when he returned from afghanistan and they never expected this. After an emotional vigil monday night, today dallas is remembering its fallen. We must lead america in protecting and supporting our Police Officers. Reporter as more protests over Deadly Police shootings spilled into several cities. Vice President Biden telling lester holt theres anxiety and fear on both sides. Its real. There is institutional racism that exists throughout our society. It is getting incrementally better. But the truth is that thats not good enough. We have to keep pushing. Reporter today Dallas Police are digging through Micah Johnsons past trying to determine why he was stockpiling bomb making materials. He knew what he was doing. This wasnt some novice. Reporter speaking to the blaze, in their first interview, johnsons parents say they watched their son transform from a fun loving extrovert into a hermit after his military service. I didnt see it coming. I love my son with all my heart. I hate what he did. Reporter this morning new details about how the massacre unfolded. Just before 9 00 last thursday, johnson pulls up in his car near the college campus. Using pillars for cover he fires multiple rounds shooting a Rapid Transit officer execution style. The gun battle rages with other officers on another street corner. He shoots out a door in a locked building on campus. Almost 60 students were inside. Over the next several hours, s. W. A. T. Teams are in a horrifying standoff across a long hallway where johnson taunts negotiators and asks how many officers hes already killed. The police chief says all the students and two of its wounded officers survived. Im extremely proud of them and extremely proud of all the members of the Dallas Police department. Reporter a night that weighs on trauma surgeon brian williams. I think about it every day. That i was unable to save those cops when they came here that night. This killing, it has to stop. Reporter as this memorial xwr grows, the police chief says he and his officers are running on fumes and another Neighboring Department will assist with security here along with the secret service, of course. Then several of the funerals for the fallen officers are scheduled for tomorrow and thursday. Hard days in dallas. It is a big day in the president ial race as well. Bernie sanders joining onetime rival Hillary Clinton on the campaign trail for the first time. And this morning, speculation is heating up over both clinton and Donald Trumps potential running mates. We have it all covered. Start with nbcs andrea mitchell. Good morning to you. Reporter good morning, matt. A month after she wrabd pped upe nomination, Hillary Clinton is final will i getting Bernie Sanders endorsement today here in new hampshire, a battleground state where he trounced her in the primary. At last for team clinton, the civil war with Bernie Sanders, the last democratic holdout is over. Weeks after his battled progressionive Elizabeth Warren embraced clinton. Im here today because im with her. Yes, her. Reporter Bernie Sanders even waiting until after president obama on the stump. Sanders and clinton not exactly a match made in heaven. Wait a minute. I have stood on the debate stage with senator sanders excuse me. Will secretary senator . Reporter now clinton, echoing sanders economic themes about the rich. They are doing better than ever. Corporate profits are up. Whereas so Many Americans are stalled or have fallen backwards. Reporter making concessions on the party platform, agreeing to a 15 an hour minimum wage, free College Public tuition but pegged to family income, a public option odded to obamacare. But will sanders followers be enthusiastic about a democrat many vowed theyd never support. The more Hillary Clinton keeps the volume high on big, bold progressive ideas, the more enthusiastic Bernie Sanders supporters will be going into november. Reporter will sanders fire up young people for clinton after promising them a revolution. It is about creating a political revolution. Reporter with the party united, clinton can focus on choosing a running mate. A safe choice like senator tim kaine. Democrats are coming together around our candidate and to win in november, republicans are jumping ship. Reporter not interested, joe biden. Unable because of his sons death to mount his own campaign for the white house. I have Great Respect for hillary. Im going to work like the devil for her but im not looking to be Vice President again and no one has talked to me. Reporter sanders endorsement is a almost plus for clinton, especially right now. In our new nbc news fbz survey Monkey Online Poll she only has a threepoint lead over donald trump today. No doubt reflecting the damage from that blistering fbi report on her emails. Savannah and matt . Andrea, thank you. As for donald trump, his Vice President ial pick could come any day now. Nbcs Halle Jackson is in cleveland where the Republican Convention gets under way less than a week now. Hallie, good morning. Reporter hi, savannah. Good morning. This is one of the biggest decisions a candidate can make. Donald trump is now promising that decision by the end of this week. The countdown to a running mate now on with the convention here in cleveland just six days away. Down to the final four, speculation swirling about Donald Trumps vp pick. But newly revealed audio from 2008 shows back then he thought his current rival would make a decent running mate. The wall street journal reporting these comments about Hillary Clinton. Well, i know her and shed make a good president or a good Vice President. Reporter a very different tone from trump now. Crooked Hillary Clinton. Reporter as he looks for a Vice President to play attack dog. Indiana governor mike pence trying out for the role tonight when he appears with trump at a rally outside indianapolis. The very idea that we would be considered along with a number of other distinguished americans for that position is very humbling. Reporter another contender, Newt Gingrich, tells nbc news the vp announcement could come in 48 hours. But gingrich says even if hes offered a spot, hes not an automatic yes. Would want to talk through exactly what does he have in mind. Reporter trump himself playing coy with short list specifics. Noncommittal on former general mike flynn. Hes militarily excellent and i think hes a great guy. That doesnt mean im going to be choosing him but hes one of the people i look at. Reporter but trump tells the Washington Post he wants someone more political. Maybe new Jersey Governor Chris Christie. Good afternoon. Reporter auditioning in virginia as trump in his most recent remarks tries to strike a balance on recent police shootings, acknowledging concerns from both officers and protesters. Not only am i the law and order candidate, but im also the candidate of compassion. Believe it. Reporter hes now predicting more violent protests this summer as security presence intensify in cleveland. The Convention Just six days out. With trump still struggling to bring together the gop. One former rival now vowing to sit this election out. Neither for me. Youre not going to get me to change that. Reporter jeb bush also telling our Nicolle Wallace he believes conservatism is dead. At least temporarily. And that concern with the gop presumptive nominee reflected to a degree here in cleveland where some delegates now starting to arrive are ready for a fight. The nevertrump movements last stand. It is not likely theyll have any success in trying to oust trump but they are getting backup this morning from the senator from nebraska, matt sass, now urging delegates to fight for the conservative principles they believe in. Halle, thank you. Let us bring in Nicolle Wallace who was just mentioned. And Bloomberg Politics managing editor Mark Halperin whos already in cleveland. Good morning. Jeb bush says he thinks conservatism is dead. A lot in the Republican Party are worried about that with donald trump as their nominee. Do you get the sense as he zeros in on a running mate that there is more at stake for him in this choice than there is for Hillary Clinton . I do. I think we focus on the names and play this guessing game, but i think the central decision is which way does he go . Does he try to solve his one political problem which is that people like jeb bush dont think hes a real conservative . Or does he try to underscore the brand that won him the nomination which is that hes an unpredictable wild card whos going to shake up washington. There are two very different paths. Mark, i think that question was set up absolutely perfectly. Assuming that a vp pick addresses some perceived deficit in the candidate, in your mind, what is the vulnerability that trump most badly needs to address with his vp pick . Well, trumps biggest vulnerability goes to the main reason anyone should pick their running mate which is someone whos perceived right away as someone whos qualified to be president. I think the bigge egest problem donald trump has is will he govern in a serious way if he is elected. Al gore, dick cheney, joe biden, all of them when they were picked faced criticism but not one critic said that guys not ready. Think thats what is what trump should do. I think thats what he will do, pick someone who people see as ready to be president. Lets make you go out on a limb a little bit more. Could those names were hearing more than any others, whos ready . Pence is a governor. Republicans love their governors. Hes viewed i think we put him in the safe category. Thats the safe choice. Christies probably the one that in his gut he probably most wants to pick. Hes been the closest thing to a partner that hes had as a candidate but he has some baggage with bridgegate. Id put gingrich and flynn behind those two. Mark, is there someone you think atop of trumps list . Let me check my devices. Make sure there is no lastminute information. I think mike pence is. I think if trump goes with his gut and his feelings hell pick christie. If he goes with his head i think it is possible the show man has a surprise in his back pocket. Pence. Let me ask you about Hillary Clinton and the endorsement by Bernie Sanders. Its been more than 30 days and sanders is finally coming around. Can he convincingly endorse her and make that sales pitch for her today, mark . I think sanders is warm and fuzzy today and hes going to pull it off. Hes not, right . Hes not one that normally shows a lot of embrace. But look, his supporters are serious and theres policy differences still between sanders and clinton. Much more than there ever were between obama and clinton. I think a lot of his supporters will be disappointed but today will go a long way towards bringing many of his people into the tent. Clinton needs them. Nicolle, is Bernie Sanders going to be warm and fuzzy today . No way. Mark, thank you. Nicolle, thank you as well. A michigan courthouse will be closed today in the wake of a deadly shooting. An inmate being moved from a holding cell managed to wrestle a gun away from a sheriffs deputy, opened fire killing two bailiffs and injuring at least two others. Heres nbcs ron mott with the story. Officer down officer down reporter this morning the Berrien County courthouse is the newest addition to americas mass shooting catalog. Caught on cell phone video from the parking lot outside. When it was over, an inmate had shot and killed two bailiffs, joseph zangaro, 61, and ron kienzle, 63, both retired cops. Our hearts are torn apart. They were our friends. They were my colleagues. I have known them for over 30 years. Reporter Officials Say the shooter, 45yearold Larry Darnell gordon, was in custody and being escorted from a holding cell to a Court Appearance when he grabbed a sheriff deputys gun and opened fire. They say he also tried to take hostages. The deputy, 41yearold father of five, James Atterberry jr. , was wounded in the arm. A female civilian was also struck by gunfire. The gunmans exwife speaking out. I dont want the press to paint a picture of him as an angry and violent person. Nobody knows the truth because they werent there. Not everybody that goes into the courtroom is handcuffed. Reporter new concerns and questions this morning on the latest in a deadly stretch of confrontations between Law Enforcement and people theyre sworn to protect and serve. For today, ron mott, nbc news, st. Joseph, michigan. There are some big developments in the uk this week. Teresa may is set to become britains second female Prime Minister after margaret that mucher. Tomorrow after only her only competitor withdrew from the race. May will replace David Cameron who announced his resignation following that brexit referendum. Cameron initially said hed step up by october but moved up the timeline when may was left with a clear path to the office. The conservative party leader said monday shes honored and humbled to be chosen. Here at home, attorney general Loretta Lynch is in the hot seat today on capitol hill. A House Judiciary Committee expected to grill lynch over her controversial meeting with former president bill clinton as well as the departments decision not to bring charges against Hillary Clinton for using private emails while serving as secretary of state. Committees also likely to ask lynch about Police Interactions with the Minority Community following a violent week that brought that issue to the forefront. We have some Important News for millions of drivers today. New tests show small suvs did poorly in headlight tests. Insurance institute for Highway Safety says none of the 21 small suvs tested earned its highest ranking. The ford escape, honda crv, Hyundai Tucson and mazda cx3 performed best but more that be half of the suvs tested received the lowest ranking. Hightech headlights did not necessarily perform better. Shifting gears, als back from his vacation. Weve had some Severe Weather to talk about last night and more today. In fact, take a look at this video. You see a barn destroyed. This is in litchfield, minnesota, about an hour west of minneapolis. These storms fired up at least two of them yesterday. Were going to be looking at some more Severe Weather firing up today in the plains. Weve already got some Severe Weather moving Foreign Policy gre from green bay down to wichita, part of a system that will die down but refire up later this afternoon from wichita to peoria, brief tornadoes, large hail, damaging winds. Tomorrow an eve