Can a powerful image change policy?

An image from the US border with Mexico of a father and his toddler daughter dead arm in arm has led to a wave of empathy. What can an image hope to change? We take a look at some analysis. Also, France's junior minister for Digital Affairs is suggesting journalists need to get organised and create an ethics council to fight fake news or else the state will intervene. Press freedom advocates are not impressed. Finally, what's the link between Munch's "Scream" and Thursday's weather forecast?