Visible crew/equipment: Near the beginning when Nick Nolte is in the back of the truck, the sun is behind the camera. You can see the shadow of the camera operator perfectly along with the camera's shadow.
Continuity mistake: At the NAACP headquarters, Medgar Evers joins other people sitting at the table to talk with Sampson. The person sitting next to him casts a long diagonal shadow across the table in each wide shot, and a short one when the camera is on Sampson.