San Francisco's Presidio

What was once home to the native tribe known as the Ohlone, and functioning as guardian of the San Francisco Bay under Spanish, Mexican, and American flags, the Presidio has served as outpost as well as cultural barometer of the vast changes this country and the state of California have seen. For almost a century and a half, the U.S. military transformed these grounds into a logistical centerpiece for every American conflict and created a pioneering airfield for early flight experiments. Th...