Ancient city of Nimrud reduced to rubble by ISIS

When the Islamic State militant group captured parts of Northern Iraq in 2014, it declared war on the ancient city of Nimrud. Though reclaimed by Iraqi forces last November, the ruins have been forever changed, the victim of massive destruction. Special correspondent Marcia Biggs joins two archaeologists to see what's left of the 3,000-year-old city after only two and a half years under ISIS.