CARACAS, Venezuela -- When President Hugo Chavez gives one of his frequent nationally televised speeches, thousands of city dwellers here often stand on apartment balconies or lean out of windows and vigorously bang pots and pans in an effort to drown out the verbose president. In these middle-class neighborhoods -- where support for Chavez and his hours-long discourses are weakest -- the din from these kitchen-inspired protests can be deafening. Residents call it cacerolazo, from the Spanish word for pot, cacerola. From Argentina to Colombia it has become the symbol of the people-power movement in Latin America, where citizens fed...