Pope greets pilgrims in St. Peter's for final time  NICOLE
WINFIELD Associated Press Published:  VATICAN CITY (AP) -- Pope
Benedict XVI is greeting pilgrims in St. Peter's Square for the
final time before retiring, waving to tens of thousands of
people who have gathered to bid him farewell.   St. Peter's was
overflowing and pilgrims and curiosity-seekers were picking
spots along the main boulevard nearby to watch Wednesday's event
on giant TV screens. Some 50,000 tickets were requested for
Benedict's final master class on the Catholic faith, but Italian
media estimated the number of people actually attending could be
double that.