Photos: Centennial celebration on parade

San Francisco Mayor Gavin Newsom took time out from riding in the parade to thank members of the police force for serving and protecting the city.

Students from St. Stephens Catholic School in Lake Merced join the festivities to mark the 100th anniversary of the 1906 San Francisco earthquake.

Willie Brown, former mayor of San Francisco, rides high at the parade in downtown San Francisco.

Union workers march proudly to celebrate the work they have done for the city of San Francisco.

Members of Cheer SF, San Francisco's premiere cheerleading squad, scan the crowd for donations to help fund their team's efforts after giving a crowd-pleasing performance.

The young men of St. Isabella Catholic School mark the anniversary of the 1906 San Francisco earthquake by marching in the parade.

Members of the San Francisco Fire Department made their march in the parade a family affair with their little ones by their side.

Kilts and bagpipes in tow, these Scots added flavor to the parade.

Proud workers of Pacific Gas and Electric march in the parade.

At the end of the parade at Market Street and Embarcadero, Lou Seal, the mascot for the San Francisco Giants, poses for his fans.

Too tired to walk, a young girl rests comfortably in a San Francisco fireman's arms at the end of the parade.