Celebrating Yosemite's 150th Birthday at California Historical Society in San Francisco
While many people will make the trek to Yosemite for the 4th of July weekend, some are tromping through the park’s history right in the middle of San Francisco. This week, the California Historical Society opened an exhibit marking the 150th anniversary of President Abraham Lincoln’s signing of the Yosemite Act, protecting the lands as a National Park. Joe Rosato Jr. reports