Photos: Centennial celebration on parade Summary: San Francisco residents commemorate the 100th anniversary of the 1906 earthquake by attending a parade and other festivities. By Bill Detwiler | July 19, 2006 -- 11:47 GMT (04:47 PDT) Follow @billdetwiler Previous | Next Image 4 of 11 Union workers Union workers march proudly to celebrate the work they have done for the city of San Francisco. Topic: Storage Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.