An Afghan police officer holds a hand grenade in the building which was occupied by Taliban militants in Kabul, Afghanistan, Wednesday Sept. 14, 2011. The 20-hour insurgent attack in the heart of Kabul ended Wednesday morning after a final volley of helicopter gunfire as Afghan police ferreted out and killed the last few assailants who had taken over a half-built downtown building to fire on the nearby U.S. Embassy and NATO compounds. (AP Photo/Kamran Jebreili)