Why do people struggle to feed themselves in wealthy societies? Food banks - depositories of donated and excess food where the neediest can collect ingredients for basic meals - have been running in America since the 1960s. But they are only meant to be for emergencies. Why then, does it seem that in some developed economies, they have become the last defence for those unable to feed themselves? The BBC’s Manuela Saragosa visits the Oasis Waterloo Foodbank in London to hear the stories of people who depend on donated food during times of hardship. We look at the different perspectives around food aid and charity – is it right to treat food banks as a political issue? And, we explore how hunger and food waste - another perennial food problem - might make interesting bedfellows. (Photo: A woman browses canned foods at a food bank in San Francisco. Credit: Justin Sullivan/Getty Images)