friendly fire friendly fire

Central Command says an errant coalition strike killed 18 fighters from the Syria Democratic Forces. A member of the U.S.-backed SDF, made up of an alliance of Arab and Kurdish fighters, inspect the Tabqa dam on March 27. Delil Souleiman/AFP/Getty Images hide caption

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Delil Souleiman/AFP/Getty Images

Andy Alaniz was killed in friendly fire in Iraq in 1991. Courtesy of Catherine Alaniz-Simonds hide caption

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Courtesy of Catherine Alaniz-Simonds

For Decades, He Carried Guilt For Another Soldier's Death

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