Boko Haram has been spreading terror across northeastern Nigeria since 2009. With indiscriminate killings, the militant Islamist sect is seeking to fight Western values and promote an Islamic state.
In March 2012 Tuareg rebels seized control of large parts of northern Mali. Among them were members of Islamist group Ansar Dine. They want to impose a radical version of Islam which is unfamiliar to local people.
Despite a series of setbacks, the militant group al-Shabab remains one of the most dangerous terrorist organizations in Africa. A former al-Shabab member tells DW what made him join the group and why he left it.