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A woman prays at a makeshift memorial near the Emanuel AME Church June 18, 2015 in Charleston, South Carolina, after a mass shooting at the Church on the evening of June 17, 2015. US police on Thursday arrested a 21-year-old white gunman suspected of killing nine people at a prayer meeting in one of the nation's oldest black churches in Charleston, an attack being probed as a hate crime. The shooting at the Emanuel African Methodist Episcopal Church in the southeastern US city was one of the worst attacks on a place of worship in the country in recent years, and comes at a time of lingering racial tensions
A woman prays at a makeshift memorial near the Emanuel AME Church June 18, 2015 in Charleston, South Carolina, after a mass shooting at the Church on the evening of June 17, 2015. US police on Thursday arrested a 21-year-old white gunman suspected of killing nine people at a prayer meeting in one of the nation's oldest black churches in Charleston, an attack being probed as a hate crime. The shooting at the Emanuel African Methodist Episcopal Church in the southeastern US city was one of the worst attacks on a place of worship in the country in recent years, and comes at a time of lingering racial tensions

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    Charleston shooting tragedy unfolds over 24 hours

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Charleston shooting tragedy unfolds over 24 hours

Anderson Cooper looks back at the events surrounding the massacre at the Emanuel African Methodist Episcopal Church.

Charleston shooting tragedy unfolds over 24 hours

Anderson Cooper looks back at the events surrounding the massacre at the Emanuel African Methodist Episcopal Church.