Brazilian President Luis Inacio Lula da Silva has urged South American countries to defend their economic and cultural ties. But with Venezuelan President Nicolas Maduro taking part, divisions were clear among the region's leaders. Al Jazeera’s Lucia Newman reports from Brasilia, Brazil. - Subscribe to our channel: http://aje.io/AJSubscribe - Follow us on Twitter: https://twitter.com/AJEnglish - Find us on Facebook: https://www.facebook.com/aljazeera - Check our website: https://www.aljazeera.com/ @AljazeeraEnglish #Aljazeeraenglish #News #Venezuela #Brazil #SouthAmerica #PresidentLula #PresidentMaduro #SouthAmericaSummit