Welcome to news4 this week. Hi, everyone, im veronica johnson. Were going to show you some of the more interesting local stories making news this week. Among them, battleground virginia, just days away from super tuesday. The candidates for president are setting their sights on the commonwealth. Plus, history in the making. Were giving you exclusive access to the new museum of africanamerican history and culture. Barbara harrison shows us some of the incredible artifacts that will be on display. And its one of the biggest murder cases youve never heard of. Now police say the key to solving it could be right up in your attic. But first, to politics. Virginia will be one of the key battleground states come november, but you can commercials with super tuesday just three days away. News4s tom sherwood reports. Reporter it was Bernie Sanders in norfolk on tuesday. Please come out to vote, help us win. Reporter president clinton stumping for hillary in alexandria. Thank you for being here. You ready to win this election . Reporter other president ial candidates are to visit virginia, a november battleground state, before next week super tuesday primaries. And virginia voters are making their choices like these voters in mclean today. Who are you going to vote for . Marion barry. Hillary clinton. Reporter ooh, and why . Because shes better for poor people. Reporter and who are you voting for . Thats my business. Reporter on sunday, republican marco and ted cruz is in Virginia Beach friday. Donald trump campaigns monday and southwestern radford. And terry mccolora culloug. We have a strong base in the commonwealth. Shes going to win virginia. Reporter virginia is one of nine States Holding primaries tuesday. Tom sherwood, news4. For an updated list of the president ial candidates and their scheduled events in virginia ahead of super tuesday, open up the nbc washington app. Just search candidate tracker. In maryland, republican governor larry hogan is more popular than ever with voters about 63 of marylanders approve of his performance. Thats up 5 since october. 86 of republicans approve and 50 of democrats think the republican governor is doing a great job. There are twice as many registered democrats as republicans in maryland. The poll was college in baltimore. Its been years in the making, but finally today d. C. s long trouble street car will carry passengers for the first time. The first street car is set to pick up riders on h street in northeast around 10 00 this morning. The street car will be free to ride for at least the first six months. D. C. Leaders say that will help people get accustomed to it. There will also be adjustments along the h street corridor, as drivers and pedestrians get used to the street car. This system wont run on sundays, because that will be the day to get some things done and the day for maintenance and repair. Well, the disturbing child Pornography Case at prince georges county. Elementary school has one lawmaker pushing for change. State senator anthony muse will allow employers access to juvenile offenses if working with children. One man facing child charges had a clean adult record but juvenile offenses that were protected. Muse says the change would have raised red flags during the background check. It would have allowed us in this situation that we are dealing with to know that there was some tremendous problems that should have raised the eyebrows of those who were in the employment industry relative to schools in this case, to be able to say this is a person that either should not have hired, or should have looked into further. The legislation is expected to head to maryland state Judicial Proceedings Committee for review this week. Senator muse is the husband of news4 anchor pat lawson muse. The National Malls newest museum will open in less than seven months and Barbara Harrison is giving us a look at africanamerican history and culture and telling the story of one of americas greatest athletes. He was a boxer known for having harrison shows us, this story comes from something his glove literally said. Reporter in 1964, 22yearold boxer cassius clay left to train at the fifth street gym in miami where his fight was against sonny listton. When the museum opens, one of the featured exhibitions will be the story of cassius clay, muhammad ali and his celebrated career. We have several pieces of material from the fifth street gym where he had trained when he was cassius clay. Reporter inside one of the giant processing rooms for the thousands of items being readied for the exhibition, Rene Anderson shows off a prized piece from the prize fighter. This is practice gloves from cassius clay. It is been a confident person. Im young, im hand some, im fast, im pretty, and cant possibly be beat reporter cassius clay was young, handsome and in those days, he was known as the louisville lip for what was seen as his cocky, some would call arrogant confidence. It says, from cassius clay, january 1964, next heavyweight champion of the world. He felt pretty confident. He was confident. Hes claiming what was to come. Reporter what he wrote on that glove proved to be prophetic. A month later, against all the oddsmakers, cassius clay defeated sonny listton to become the heavyweight champion of the world. He then punched his way through famous fights with joe frazier and george foreman, entertaining with his pummeling jabs, his prancing footwork and a personality filled with poetic wit. Likeis butterfly, sing like a bee. His controversial conversion to islam, changing his name to muhammad, and refusal to invite in vietnam shut down his career for a few years. Temporarily taking away his titles. He was down, but not out. And in Standing Firm for his principles on Racial Justice and religious freedom, he won the respect of many. He made a comeback in the ring, regaining his lost titles, and he remains today the only man who has three times been crowned heavyweight champion of the world. By the world boxing association. Muhammad ali proudly earned his place in history books as one of americas greatest athletes, earning the praise of president s and people around the world. While books tell his story, the museum hopes to do more. I think people get excited when, you facts directly and indirectly associated with him as a person, and the context and experience that he had. Reporter a small glove that tells a very big story. Of course, there will be a lot more to learn about the life of muhammed ali at the museum after it opens on september 24th. And you can see all of barbaras reports on the new museum on our nbc washington app. Well, on the Eastern Shore, involving the most coveted of birds in america. What some scientists believe may be behind the deaths of more than a dozen bald eagles. Plus, breweries are exploding in our area. Theyre exploding everywhere. Now a local university is offering a class to help you learn how to get in on the trade. More than a dozen bald eagles found dead Eastern Shore may have been poisoned. A man discovered the birds earlier this week on a fredericksburg farm. Maryland Natural Resources say its unlikely the birds were intentionally shot, but they could have eaten poisoned rodents or been killed by a chemical sprayed in the area. Its illegal to kill bald eagles. A 10,000 reward is being offered for information in this case. And you can get a look at a rare and familiar flowers from plants all over our National Parks across the country. You dont have to go very r. Just head down to the u. S. Botanic garden in southwest d. C. The new exhibit opened this week, showcasing artwork from more than 70 artists. Some of those paintings include the giant sequoia at Yosemite National park. The show celebrates the 100th anniversary of the National Park service. Wow. A new course at Virginia Tech may have and saying, cheers. The university now has a new brew house for malting beer research. Students will learn malting, brewing and fermentation neck neegs. And may be able to use the facility to develop new varieties of alis and loggers. Similar to most craft breweries, Virginia Tech will be able to brew up to 66 gallons per batch. Police have been working for nearly a century to solve a crime. Now our iteam is getting an inside look at the car barn murders, and how you can help crack that case. And metro is taking a lot of heat, but a new study says that d. C. Has it easy when it comes to Public Transportation. Its one of the most highprofile crimes ever in our region. But most people have never even heard of it. Its called the car barn murds, unsolved case in montgomery county. But as Tisha Thompson and the news4 iteam show us, police think the clue to cracking this cold case could still be out there. Reporter when you look at old photos, what do you see . The clothes, the vehicles, men with longforgotten names . Theres a couple things that might be bullet holes. Reporter detective Ryan Stafford looks for the tooib details. Theres one there, one there, maybe one up there. Reporter detectives before him may have missed. This is the capital crescent trail in chevy chase. But in 1935, the beano railroad came right through here, and at this spot, it intersected with connecticut avenue, which looked a whole lot different in those days. The capital transit trolly system had a huge car barn here, and a little ticket office, where conductors turned over the fares they collected each day. In 1935 dollars, it was 1,229. So over 20,000 in todays money. Reporter it started as a robbery, including 60 in quarters. 31 in dimes. And a single 20 bill. A meticulous list kept by james mitchel, the trolly clerk. He was waiting for the armored car to come and collect this money. Reporter mitchell was found inside his locked office, shot through the head the night watchman floating in rock creek below the kensington parkway bridge. This is the american watchmans time detector company. Reporter the case file is filled with 81yearold relics. There is a circle right here. This was the last time that mr. Smith punched in on his time clock as he was making his rounds. And thats how they helped narrow down the time of the crime. Reporter detect stafford says it might be old, but all of this evidence can still hold up in court. Like these suspicious footprints in the snow. Somebody was Walking Around out there, and envelopes from the funeral home containing bullet fragments. You can see the markings from the rifling. Reporter police never found the murder weapon. If you look at the striations on here, you can see how they all run vertically. Reporter but this fbi ballistics report tells detective stafford what to search for. Colt model semi automatic pist pistol. Reporter they have telegrams, stick ups and get being rid of people before they squawk. Its all kept on the back shelf of the countys cold case evidence room. The first in a line of boxes filled with stories of families who never got closure. I think theyre all solvable. Reporter but stafford is realistic. Its not a case were actively investigating. We do have to focus on our cases where we have either victims who are still alive, victims families who are still alive, and where the suspects might still be out there and could be brought to justice. Reporter he says allf suspects in the car barn murders are long gone. But he thinks the missing link is still living among us. If you ever heard stories about, you know, your old grandpa who was the old bootlegger back in the 30s and some stories about a robbery at the car barn that he might have been involved with or he knew who did it or anything like that, call us. Reporter which is why, everyone so often he pulls out the file. It is an open murder. And we dont close murders, and we dont forget about them. Reporter searching for what may be hidden in plain sight. In chevy chase, Tisha Thompson, news4 iteam. What a mystery. A special thanks to the chevy chase Historic Society for their help on this story. Now, if you happen to find a 1903 colt firearm in your attic or basement, detective stafford wants to hear from you. He says you will not get into any trouble. March madness isnt just for basketball when we return, the local Gymnastics Team that is looking to make championship this spring. Okay. Whats that you say . We hear you. We know you have a lot of gripes about metro. But it appears other cities might have it worse. D. C. Has been named the best city in the country for Public Transportation by finance Technology Site smart asset. The study considered factors like average commute time and percentage of commuters who use Public Transportation. Safety and delays were not included. But San Francisco was second here, followed by boston and chicago. And then on to new york. March madness right around the corner, and march madness isnt just for basketball teams. But womens gymnastics. George washington ranked as high as seventh in the nation this season. Now with an eye on the postseason, thanks to experience. And not just how they practice, but how they start practice. Carol maloney reports. The sign doesnt say we will try. It says we will. Were holding ourselves and our teammates accountable. Were getting in and doing our job. We will give our all. We will conquer the day. They are committed and focused and ready to be taught. Reporter educated by a teacher with over three decades of experience. In Margie Foster cunningham. People will say, how can you do this for 31 years . Its different every year. Its never the same. She is going to get the best out of you as an athlete, and not even as an athlete. As a person too. Big, big, big. Physically, we came here, we had our skills. But shes amazing at tweaking our mind set and putting us into that competition setting. There we go that a girl i enjoy the challenge of putting whats in my head and trying to get it into someone elses. And, you know, i really know that sport teaches life lessons. I believe it down to my car. Everything goes reporter but next, spring boarding to a National Title for a team that believes in tight bond. Its an uphill battle the entire season. But were only going to get there if we get there together. We just have to stay focused and we can be in the game at the end. Its all about that one moment, though, when who is going to be great that day. We believe gw can be there. Sure, sports does teach life lessons, but it takes a good coach. And she looks fantastic. The ladies will learn of their postseason tournament path in late march. Hey, thats all for news4 this week. Im veronica johnson. Thanks for joining us. Were going to leave you with some amazing rainbows that came after this weeks severe storms. Hope they dont come any time soon again. Until next time, be safe, be kind, be happy. Byebye, everybody. Announcer nbc sports, home of the 2016 rio olympics. The nhl. Premier league. The nascar chase for the sprint cup playoffs. And primetimes number one show, sunday night football. Only on nbc. Springlike conditions here in chicago. The temperature, 57 degrees and two teams who plan on playing very deep into the spring. We have the defending stanley cup champions, Chicago Blackhawks, here at home as they play host to the Washington Capitals who have the leagues best Overall Record right now. We welcome you inside the united center. Lots of changes here in chicago. One of the newest blackhawks on the ice right now, heres andrew ladd. Andrew, youre back in a Chicago Blackhawks uniform. What went through your mind when you heard the news