Vallejo, a city about 25 miles north of San Francisco, offers a sneak preview of what could be the latest version of economic disaster. When the foreclosure wave hit, local tax revenue evaporated. The city managers couldn’t make their budget and eliminated financing for the local museum, the symphony and the senior center. The city begged the public-employee unions for pay cuts — all to no avail. In May 2008, Vallejo filed for bankruptcy. The filing drew little national attention; most people were too busy watching banks fail to worry about cities. But while the banks have largely recovered, Vallejo is still in bankruptcy. The police force has shrunk from 153 officers to 92. Calls for any but the most serious crimes go unanswered. Residents who complain about prostitutes or vandals are told to fill out a form. Three of the city’s firehouses were closed. Last summer, a fire ravaged a house in one of the city’s better neighborhoods; one of the firetrucks came from another town, 15 miles away. Is this America’s future?