Trending Topics at 5 o'clock. Former UFC heavyweight champion, Cain Valasquez was arrested on suspicion of murder after he shot at a man who allegedly molested his young family member. An update on the Fresno Co. jail incident. A cargo ship with almost 4k high end cars sank after lithium-ion batteries on electric vehicles caught on fire. Fitbit is recalling 1.7m watches after batteries overheat. The teenager who once tracked Elon Musk's plane is now tracking the planes of Putin and Russian oligarchs. A look at the streets of Ukraine. 

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