The consistent approach to Sinai has been from a security perspective—a zero-tolerance one.
Rupert Murdoch The 80-year-old head of News Corporation, said to be insisting on a "zero-tolerance" attitude to phone-hacking.
But think of corruption today and we would all accept nothing but a zero-tolerance policy.
To aim at or concentrate on a specific person, thing, etc; single out: We're trying to zero in on the problem
[1944+; fr the zeroing of the sights of a rifle, that is, adjusting the sights so that the round hits the exact point aimed at and the shooter needs to make no, or zero, estimated correction in aiming]