Extreme weather, Ukraine's NATO hopes, and Juneteenth commemorations

Americans are dealing with extreme heat, wildfires and a tropical storm threat. The US is facing criticism over Ukraine's NATO hopes, as Russia's president continues his trip to North Korea. CNN is marking Juneteenth with a special event tonight. The nation’s second-largest school district is banning students from using cell phones during the school day. And, the San Francisco Giants say baseball legend Willie Mays has died at the age of 93.

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