Americans of Japanese descent gathered at Santa Anita Park yesterday to reflect on the dark period of history when Santa Anita Park was the largest assembly center for interned Japanese-Americans. Nearly 20,000 were processed at Santa Anita Park and sent to internment camps. Several people who were once incarcerated at Santa Anita Park were among those who gathered there at the Cherry Blossom Festival Southern California's 11th Annual Camp Stories Award Show and Auction.