Today on CNN10: We'll take a look at protests in major cities across the U.S. after a woman was killed during a confrontation with federal immigration agents in Minnesota last week. Then, we'll see how a winter snow drought is fueling water concerns in states across the Western U.S. Plus, we'll get a look at a discovery that scientists say could shed light on one of the biggest mysteries in the universe. All this and more on today's CNN10!

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