Pope Benedict XVI, flanked by Vatican secretary of state Cardinal Tarcisio Bertone, left, and Italian Premier Mario Monti arrives at Rome Fiumicino international airport to board a plane on his way to a six-day visit to Mexico and Cuba, Friday, March 23, 2012. Pope Benedict XVI has used a cane apparently for the first time in public for about 100 meters (yards) to the foot of the Alitalia plane from the helicopter which flew him from the Vatican to Rome's Leonardo da Vinci airport. (AP Photo/Andrew Medichini)

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