Adam WeatherfordChris Pfanner attempts to conquer Raoul Wallenberg High's famed "Big Four" At first glance, San Francisco's Raoul Wallenberg High looks to be just another city school with peeling paint, tall fences, and randomly tagged walls. And yet, this is is one of the most hallowed and revered sites in the world of skateboarding. Just behind the Western Addition school is a broad, four-step stairway that measure six-feet-high and 18-feet-long. On Saturday, hundreds of people packed into the