Original copy of Magna Carta identified

Medieval scholars in the UK have identified a rare original copy of the Magna Carta. Now seen as a landmark legal document in the Western democratic tradition, the 800-year-old charter reined in the power of the king and enshrined the rights of his subjects, as Nicholas Vincent tells host Marco Werman. Vincent is a leading expert on the Magna Carta and teaches medieval history at University of East Anglia in the UK.