New historical markers are going up in Montgomery to document the city's leading role in the slave trade before the Civil War.
The markers are being dedicated Tuesday by the Montgomery-based Equal Justice Initiative, a nonprofit legal organization that says it wants to address the problems created by slavery's legacy.
Cast members from the movie "12 Years a Slave" are set to participate in the dedication.
A historical marker already stands at the site of an antebellum slave market in Montgomery.
The three new markers tell the story of the city's slave trade in greater detail.
The markers are being erected at the same time the group is releasing a report documenting Montgomery's slave trade.
The report says some 435,000 slaves were held in Alabama before the war.
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