Mosul left in rubble, crews search for dead loved ones

Mosul's old city is a scene of utter devastation. Although Mosul has been liberated, the fight continues in some pockets. Entire neighborhoods have been flattened by coalition airstrikes in the battle against the Islamic State, leaving few survivors to search for remains of family members. Special correspondent Marcia Biggs and videographer Alessandro Pavone report on the human toll.