![Fire and smokes erupt from a Pakistan' military air base after an attack by militants in southern Pakistan's Karachi on May 23, 2011. Four foreigners reportedly killed in a terrorist attack at a Pakistan Air Force base in Karachi late Sunday night, local Urdu TV channel ARY reported. [Masroor/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20110523/001fd04cf34a0f44183f4e.jpg "Fire and smokes erupt from a Pakistan' military air base after an attack by militants in southern Pakistan's Karachi on May 23, 2011. Four foreigners reportedly killed in a terrorist attack at a Pakistan Air Force base in Karachi late Sunday night, local Urdu TV channel ARY reported. [Masroor/Xinhua]")
Fire and smokes erupt from a Pakistan' military air base after an attack by militants in southern Pakistan's Karachi on May 23, 2011. Four foreigners reportedly killed in a terrorist attack at a Pakistan Air Force base in Karachi late Sunday night, local Urdu TV channel ARY reported. [Masroor/Xinhua]