Photo by: Amie Valle Maybe some of you wonder how San Francisco ended up having a carnaval? Well, the story is about a girl with a dream. Here is how it happened: On a chilly and rainy Sunday, February 25th, 1979, the winds of change swept through San Francisco's Mission District, carrying with them the vibrant colors and infectious rhythms of a long-awaited celebration. Three hundred drummers and dancers adorned…