Pope Benedict XVI 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&#x27;s Leonardo da Vinci airport.  (AP Photo/Andrew Medichini)
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