A butcher walks by an empty stall at a market in Buenos Aires March 27, 2008. Angry truckers tried to break up a farmers' road-block in central Argentina on Thursday as an escalating farm revolt over taxes that has emptied meat counters and paralyzed exports entered its third week. The farm protests against higher taxes on soy and other key exports have become a major crisis for President Cristina Fernandez, who planned to speak at a rally of supporters on Thursday to counter two nights of pro-farmer protests in the capital. The strike has halted grain exports from Argentina, an agricultural powerhouse, and is affecting soy buyers in Europe and China. REUTERS/Santiago Pandolfi (ARGENTINA)