15. Je Suis Charlie
Brothers Saïd and Chérif Kouachi killed 11 people and injured 11 others after forcing their way into French newspaper Charlie Hebdo on 7 January. The brothers belonged to the Islamist terrorist group Al-Qaeda who took responsibility for the attacks in response to supposedly offensive cartoons depicting the prophet Muhammad. Four days later, 2 million people gathered in Paris for a rally of national unity.