‘National Defense Area’ on the California-Mexico Border—What to Know

Hundreds of acres of public land near the Mexico border have been put under the control of the U.S. Navy for the sake of national security.
The Trump administration announced the plan, which is a continuation of a project started by the Theodore Roosevelt administration, on Dec. 10. The land is now designated as a “National Defense Area.”
Here’s what we know about the change. 
Militarized Zone
The 760 acres transferred to the military will now officially be a militarized zone.
The area runs from one mile west of the California-Arizona state line to the western edge of the Otay Mountain Wilderness Area in San Diego and Imperial counties….