All around the edges of San Francisco Bay you'll find reminders of a once robust military presence in this area. The Presidio, Alameda Naval Air Station, Mare Island Naval Shipyard, Fort Baker and a slew of others—all of them closed. The Bay was once considered a strategic military stronghold, the 'Gateway to the Pacific,' but at some point that changed. This week, in the first installment of a two part story, Pauline Bartolone digs into the history of why the Bay Area's military presence has mostly disappeared.

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This story was reported by Pauline Bartolone. Bay Curious is made by Olivia Allen-Price, Katrina Schwartz, Amanda Font and Christopher Beale. Additional support from Jen Chien, Katie Sprenger, Paul Lancour, Maha Sanad, Holly Kernan and the whole KQED family.