Tunisia in turmoil. Thousands take to the streets after the assassination of the secular Opposition Leader. It is the second such killing this year. Searching for answers. And investigations into why a train in the northwest of spain flew off the tracks killing 80 people. They are focusing on the seat it was traveling. After visiting one of rio de janeiros most dangerous slum pope francis received a frenzied welcome kicking off world news day at copacabana beach. Those at the top stories we are following on france 24. We begin with all to familiar scenes in tunisia. Riot police and protesters are clashing outside the interior ministry after the assassination of the opposition figure sparked angry demonstrations. He was a critic of the ruling islamist and mandy are pointing the finger at the party for his murder. It is the second such murder this year. Gunned down in front of his wife and daughter. The Opposition Leader was shot 11 times before being brought to this hospital. His daught