Pope, in final message, says he's a simple pilgrim

Pope Benedict XVI entered to deliver his final greetings to the assembly of cardinals at the Vatican Thursday, before he retires in just a few hours. Benedict urged the cardinals to work in unity and promised his "unconditional reverence and obedience" to his successor in his final words to his cardinals today in a poignant and powerful farewell before he becomes the first pope in 600 years to resign.