Cardinals hold final mass in St. Peter's Basilica before papal conclave

Catholic cardinal electors from five continents began Wednesday with a final mass before the start of the conclave to elect a new pope to lead the Catholic Church. CBS News senior foreign correspondent Seth Doane has more on what to expect. Rev. Msgr. Richard B. Hilgartner, a pastor at the Archdiocese of Baltimore, also joins to discuss the conclave process.