A billion here, a billion there ...

From the paper that brought you Times v. Sullivan:

An article on Wednesday about a proposal from an M.I.T. doctoral student to remake the student assignment system used by Boston’s schools misstated the reason for the implementation of court-ordered busing in the city in the 1970s. It was to end segregation, not desegregation.

War on Editing or not, sometimes a really determined error is going to slip through all the defenses.