Over the howls of historians, Union Pacific plans to demolish an 1874 cavernous brick warehouse in West Oakland that is one of the last remnants of the transcontinental railroad. Designed for train repair, the towering structure was erected on the heels of the transcontinental railroad's arrival in Oakland, in the days when West Oakland was a national industrial center. "It tells the story of when railroads were the pioneer industry in California, and this was the center of it," said architect Randy Ruiz, one of 30 visitors Union Pacific allowed to tour the building recently. "It represents that can-do American...