US and Iran trade threats ahead of Geneva talks

Tensions are escalating between the US and Iran ahead of nuclear negotiations in Geneva. Washington says Tehran is attempting to rebuild elements of its nuclear and missile capabilities, while Iranian officials insist their programme is peaceful and warn of severe retaliation if attacked. As both sides balance diplomacy with threats of military action, the outcome of the talks could determine whether the region moves toward de-escalation or a wider conflict. Andy Roesgen reports