Is Camp Pendleton defensible? Sure, it belongs to the U.S. Marine Corp - one of the most formidable military forces in the world. But that may not be enough to fend off politicians, developers and others who see the sprawling, 200-mile base as a solution to a myriad of problems facing Southern California. From a new airport in San Diego County, to housing, park space and environmental preservation, there are no shortage of ideas for reimagining Camp Pendleton. Zocalo Public Square columnist Joe Mathews says Camp Pendleton may no longer be necessary for national security – and it may just be too wonderful for the Marines to keep it for themselves.