Authorities in Mexico offer protection to singer Natanael Cano after violent threats from a drug cartel targeting him and other artists.
Read moreExplore the documentary "I Am Ready, Warden," featuring John Henry Ramirez's outreach to the son of his victim, Pablo Castro.
Read moreThe first U.S. death from bird flu raises questions about the virus's mutation potential, but experts state the overall public risk remains low.
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