Pope Benedict XVI greets U.S. Defense Secretary Leon E. Panetta after the pontiff's weekly general audience in Paul VI Hall at the Vatican on Wednesday, Jan. 16, 2013. (AP Photo/Jacquelyn Martin)

Photo by: Jacquelyn Martin

Pope Benedict XVI greets U.S. Defense Secretary Leon E. Panetta after the pontiff's weekly general audience in Paul VI Hall at the Vatican on Wednesday, Jan. 16, 2013. (AP Photo/Jacquelyn Martin)