william hildebrandt explains. >> this image from january 2, in red, dense vegetation. this is the aftermath of an attack by boko haram militants. amnesty international published these images and said the group launched 23 separate attacks in northeastern nigeria. officials said 20,000 people have said after 16 villages were burned to the ground. as many as 2000 people were killed. >> they overwhelmed a military base outside the town and it shot civilians as they tried to flee. they went house to house, pulling out young men and shooting them in the streets. >> last year, they killed more than 10,000 people. the violence is increasing. >> we do not see any signs of the situation improving. we are seeing a surge of violence and succession of armed conflicts. >> at many have fled but the violence has followed. on saturday, 19 people have been killed. there was little prospect people would be allowed to vote in militant held areas. >> a dictator was ousted after 23 years in power. four years later they elected a parliament and a president, but many tunisians are waiting fo