9 / 15
A flag from Argentina waves in the foreground as Pope Francis, bottom, is driven through the crowd prior to his inaugural Mass, in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis thrilled tens of thousands of people on Tuesday gathered for his installation Mass, taking a long round-about through St. Peter's Square and getting out of his jeep to bless a disabled man in a wheelchair in the crowd. (AP Photo/Domenico Stinellis)

Pope Francis celebrates first mass

Pope Francis celebrated his inaugural mass on March 19 in St. Peter's Square at the Vatican, among political and religious leaders from around the world.