(A crowd gathers along Via della Conciliazione leading to St. Peter's Square to attend the inauguration Mass for Pope Francis at the Vatican, Tuesday, March 19, 2013. Pope Francis urged princes, presidents, sheiks and thousands of ordinary people gatheredfor his installation Mass on Tuesday to protect the environment, the weakest and the poorest, mapping out a clear focus of his priorities as leader of the world's 1.2 billion Catholics. (AP Photo/Domenico Stinellis))
