20 Years Have Passed Since The Disappearance Of Tionda And Diamond Bradley

CHICAGO (CBS) -- Tuesday will mark 20 years since the disappearance of Tionda and Diamond Bradley.

The sisters were 10 and 3 years old when they vanished from their mother's Bronzeville apartment while she was at work.

Their disappearance launched one of the biggest manhunts in Chicago history.

Police searched fields, rail cars and thousands of abandoned buildings but turned up nothing.

New age progression images were released by the FBI showing what the Bradley sisters might look like today.