Article Photos: US cardinals seek answers on Vatican dysfunction 4/18

A man sings religious songs in front of pope's apartment from witch the pontiffs traditionally celebrate the Angelus prayer, in St. Peter's Square at the Vatican, Sunday, March 3, 2013. Benedict XVI's 8 p.m. resignation Thursday, Feb. 28, opened what is known as the "sede vacante'' or "vacant see'', the transition period between papacies when a few key Vatican officials take charge of running the church.(AP Photo/Andrew Medichini)