Updated: Thursday, 28 Feb 2013, 10:10 AM CST
Published : Thursday, 28 Feb 2013, 10:10 AM CST
Benedict XVI's helicopter is circling over St. Peter's Square before heading to Castel Gandolfo, where he will make his final appearance as pope. Spectators around the helipad are hanging out signs that read "thank you."
A tornado roared through Oklahoma City suburbs, flattening entire neighborhoods,…