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Posted on August 28, 2013 at 6:28 PM
Updated Wednesday, Aug 28 at 6:41 PM
At precisely 3 p.m., members of the King family tolled a bell to echo King's call 50 years earlier to "let freedom ring." It was the same bell that once hung in the 16th Street Baptist Church in Birmingham, Ala., before the church was bombed in 1963.