Militants kill at least 18 in Kabul

A suicide bomber detonated explosives near Kabul’s shopping center; two more blasts followed. Two of the attackers are said to be shot dead. The Taliban have claimed responsibility for the attack, saying that they had deliberately targeted foreign aid workers. The population is concerned that if their own government can’t protect the capital, how can they protect the rest of the country? Martin Patience, BBC correspondent joins us from Kabul with more.