CBS Evening News With Norah ODonnell
35,000 civilians by accident. >> reporter: israel insists it is doing its best to limit civilian casualties and that hamas uses civilians as human shields, but that wasn't enough. weeks later, mann resigned, later explaining in a letter. >> at some point, whatever the justification, you are either advancing policy that enables the mass starvation of children, or you are not. >> reporter: you felt your work was directly connected to starving children? >> yes. there's going to be times when there are members that have different views, and certainly you are right to go ahead and get out and i wil...