JFK assassination: Returning to Dallas, 50 years on

This week marks 50 years since the assassination of US President John F. Kennedy. We hear from witnesses who saw the shooting first-hand. Also, as Honduras goes to the polls, we go to the country's most dangerous city, where drug violence and poverty are rife. Finally, Mexico is hauled before the UN on allegations of human rights abuses. Our reporter investigates why journalists and activists receive so little protection from the state.