10 Things to Know About Somali Militants Al-Shabab
Why Are They Attacking Kenya?
Al-Shabab has warned for two years that it will attack Kenya in retaliation for the country's leading role in sending troops to Somalia in 2011 and effectively reducing the extremist group's power in Somalia. Al-Shabab also claimed responsibility for the July 2010 suicide bombings in Kampala, Uganda, that killed more than 70 people watching a World Cup final soccer match at a restaurant popular among foreigners. Ugandan troops also are fighting in the African force in Somalia. The group has staged ongoing major attacks within Somalia for years.
In this image, police take cover behind escalators as smoke fills the air inside the mall. (Photo: AP Photo/Jonathan Kalan)