A hot air balloon prepares to lift off from Mexico City's Zocalo plaza, Sunday, Nov. 22, 2009. The one-day exhibition was organised by the local government to promote tourism. The Metropolitan Cathedral is seen in the background.(AFP Photo)
People look at hot air balloons during an exhibition at the Zocalo Square in Mexico City November 22, 2009.(AFP Photo)
People look at hot air balloons during an exhibition at the Zocalo Square in Mexico City November 22, 2009.(AFP Photo)
People look at hot air balloons during an exhibition at the Zocalo Square in Mexico City November 22, 2009.
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