Violence erupts ahead of Guinea's presidential polls. At least 15 people are wounded in clashes between supporters of the president and his main rival. Also, mediators say South Sudan's warring factions have violated a ceasefire agreement over 50 times in the last 20 months. FRANCE 24 speaks to South Sudan's Ambassador to France. And Tunisia's National Dialogue Quartet scoops the 2015 Nobel Peace Prize for helping keep the country's democratic transition on track.
