MINNEAPOLIS (WCCO) — These are the four stories you need to know about for Monday, Sept. 28. They include a special announcement about the Red Planet as well as another violent weekend in Minneapolis.

Another Violent Weekend In Minneapolis

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Three people were shot to death across the city over the past couple of days, bringing the number of homicides to 34 for 2015. That’s a 15 percent increase from this time last year. In the first shooting, two people were killed in what police are calling a domestic-related shooting on Friday night. It happened at a home in the 2200 block of South 10th Avenue. Neighbors tell us a woman and her daughter were the ones killed. Two people were taken into custody. One of them is believed to be a suspect, the other was taken into protective custody. About six hours later, police found a man dead in front of a home in the 1800 block of Newton Avenue North. Nearby, they found another man who’d been shot in the foot. No arrests have been made.

NASA To Make Mars Announcement Today

NASA says it will reveal a “major science finding” from its exploration of Mars on Monday. The agency sent out a new release that only says: “Mars Mystery Solved.” There are reports this announcement has something to do with water being found. Such a discovery could have an important impact on NASA’s quest to send a manned mission to the red planet by the 2030’s.

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Obama, Putin To Meet At U.N.

President Obama will address the U.N. General Assembly in New York. He’s expected to discuss world issues, including the crisis in Syria. But perhaps the even bigger story-line is that he’ll meet with Russian President Vladimir Putin. Their last sit-down was more than two years ago at the G8 summit. At the time, the two leaders clashed over how to resolve Syria’s civil war.

Connection Between Legal Drinking Age & Dropout Rate?

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There’s been debate about the legal drinking age since it became 21 back in 1986. Now, a new study raises the possibility that changing the legal drinking age back to 18 would increase the high school dropout rate. Researchers looked back at higher dropout rates in the 1970s and 1980s, when many states lowered the age young people could buy alcohol. They say younger and more vulnerable high school students had an easier time getting alcohol from their friends.