Installation technicians Craig Harris (left) and Paul Tavian hang , Arrangement in Grey and Black, No.1, by James McNeill Whistler, at the de Young Museum, in San Francisco, Calif., Wednesday, May 5, 2010. The large painting popularly known as "Whistler's Mother is considered an American icon. The painting is part of an exhibit, Masterpieces from the Musee d'Orsay on view at the de Young Museum from May 22 to September 6, 2010. (John Green/Staff)
Craig Denton, a sergeant with the San Mateo County Sheriff's office, holds a rose in honor of a slain police officer, in Redwood City Calif., Tuesday, May 4, 2010. San Mateo County and the State of California honored fallen officers in a memorial ceremony service Tuesday at the old County courthouse . (John Green/Staff)
A salt pond at the Cargill Salt Company, on Thursday, June 26, 2010. The company is planning to shut down all operations next year.