In Brazil, activists call on leaders to combat global hunger, as G20 summit to open in Rio

Diplomatic tensions over global warming will take center stage at the G20 summit in Brazil this week, as negotiators at U.N. talks in Azerbaijan hit an impasse. Meanwhile activists take to the beaches of Brazil to call on world leaders to commit to combating global hunger. The protest, organised by the NGO "Rio for Peace" comes ahead of the G20 summit set to take place next Monday and Tuesday. Story by Rachel Griffiths.