FREEPORT - The Freeport/Stephenson County Visitors Center has opened an Expo for the Lincoln-Douglas Debate Sesquicentennial Celebration, which commemorates the famous 1858 debate between Abraham Lincoln and Stephen Douglas in Freeport. The Sesquicentennial Celebration will be held Labor Day weekend, Aug. 27 through Sept. 1.Included in the Expo are two carriages representative of the Lincoln and Douglas era. One is the 1869 John Addams' Henney carriage.