Pope Benedict XVI will resign at the end of the month. He's the first pope to do so since Gregory the XII in 1415.  Elected in 2005, Pope Benedict followed in the footsteps of his mentor, John Paul II, and he inherited a church marred by scandal. Joining us for more from Rome is  Robert Mickens, Rome correspondent for The Tablet, an international Catholic weekly. Sister Simone Campbell  led the Nuns on the Bus tour and was one of the breakout stars of last year's Democratic National Convention.