define operation gatekeeper
More Mexicans attempted illegal entry into the US, and the US responded with a series of border control operations designed to prevent illegal border crossings-- Operation Gatekeeper in California, Operation Hold-the-Line in Texas, and Operation Safeguard in Arizona.n June of 1996, members of the Border Patrol union publicly alleged that Border Patrol supervisors were improperly manipulating data to create the false impression that the Gatekeeper initiative had successfully deterred illegal border crossings at the San Diego border.