Conclave begins: Cardinals enter Sistine Chapel to elect Pope Francis' successor

Catholic cardinals have entered the Sistine Chapel where they will sequester themselves for the centuries-old ritual of conclave, a secretive vote to elect the 267th pontiff following the death of Pope Francis. Hailing from 70 different countries, the geographically diverse group chanted the meditative 'Litany of the Saints' and the Latin hymn 'Veni Creator,' as they walked in, imploring the saints and the Holy Spirit to help them pick a pope.