This week, the U.S. is using diplomacy with Pakistan and Afghanistan to battle Islamic extremism, but on another front of that fight, tensions in Somalia boiled over. Today, an Islamist Somali militia has seized control of a town near the border with Ethiopia following days of fighting in the Somali capital of Mogadishu that has left dozens dead and over a hundred injured. Joining us now from London is BBC Africa Editor Martin Plaut.