Islamic rebel group responsible for Somali attack

Al-Qaeda-linked rebels of the al-Shabab militant group claimed responsibility for a suicide attack in the Somali capital on Tuesday, in which 70 people were killed. For more than two decades, Somalia has not had a functional government, and the U.N.- backed transitional government does not have effective control even of the capital, where the attack took place. Ongoing violence and instability have been major contributing factors to the humanitarian crisis threatening millions of people across the Horn of Africa. Some estimates say the famine in the Horn of Africa is the worst in 60 years. It affects more than 12 million people, most of them women and children. Listen