stepping out into the cool wet fog on a summer morning,i am reminded that this is july in San Francisco. People leave their houses for work,hustling onto buses,boarding street cars,evading the fog as it snatches at any bare skin. The fog dose disappear...usually...by late morning when the skyscrapers downtown are sparkling again. But by late afternoon,it has invariably found its way back fingering its way through the golden Gate Bridge,hovering over the bay near Alcatraz,raedy to wrap around us again as we return home.