zero in

Investigators zeroed in on irregular air-traffic-control staffing in that deadly crash.

In one stark example, some California rehabs have zeroed in on Oklahoma, a state with a high rate of addiction and a Blue Cross & Blue Shield plan that paid well for out-of-state care.

They then zeroed in on the O'Coqueiro restaurant in Porvorim - the only place which offered affluent foreigners the facility to make quick international calls.

“Last Week Tonight” host John Oliver zeroed in on Kimmel’s suspension and the Federal Communications Commission during his Sunday night episode.

England have locked on to a team and zeroed in on their prize.