Ukraine military relies on Soviet-era tanks and helicopters ahead of counteroffensive

Read MoreKyiv said it had received the first Patriot missiles, seen as one of the most advanced U.S. air defense systems as Ukraine prepares for a counteroffensive. An entire tank battalion is hidden inside dense forest in eastern Ukraine, but the tanks are old, from the Soviet era. Holly Williams reports.Kyiv said it had received the first Patriot missiles, seen as one of the most advanced U.S. air defense systems as Ukraine prepares for a counteroffensive. An entire tank battalion is hidden inside dense forest in eastern Ukraine, but the tanks are old, from the Soviet era. Holly Williams reports.