An Afghan police officer keeps people away from the site of a suicide attack in Kabul September 18, 2012. A suicide bomber blew up a mini-bus carrying foreign and local contract workers near Kabul airport in Afghanistan on Tuesday, with at least nine bodies lying near the wreckage, a Reuters witness at the scene said. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS) 

Afghan security personnel carry bags belonging to foreign contractors at the site of a suicide attack in Kabul September 18, 2012. Afghan insurgent group Hezb-e-Islami claimed responsibility for the suicide attack on a minibus that killed nine people, including foreigners, near Kabul airport on Tuesday and said it was launched in retaliation for a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS RELIGION) 

An Afghan man reacts over the bodies of victims at the site of a suicide attack in Kabul September 18, 2012. Afghan insurgent group Hezb-e-Islami claimed responsibility for the suicide attack on a minibus that killed nine people, including foreigners, near Kabul airport on Tuesday and said it was launched in retaliation for a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS RELIGION) 

The body of a foreigner lays on the ground as Afghan security personnel investigate at the site of a suicide attack in Kabul September 18, 2012. A suicide bomber blew up a mini-bus carrying foreign and local contract workers near Kabul airport in Afghanistan on Tuesday, with at least nine bodies lying near the wreckage, a Reuters witness at the scene said. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS) 

Afghan police arrive at the scene of a suicide attack in Kabul September 18, 2012. Afghan insurgent group Hezb-e-Islami claimed responsibility for the suicide attack on a minibus that killed nine people, including foreigners, near Kabul airport on Tuesday and said it was launched in retaliation for a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS RELIGION) 

Afghan policemen keep watch during a demonstration, as smoke from burning tyres rises in the background, in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

Riot policemen run towards protesters during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

Afghan policemen march towards protesters past burning tyres during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

An Afghan police officer looks at a damaged police car after clashes with protesters during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Mohammad Ismail (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

An Afghan walks past tyres burnt on a street by protesters during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Mohammad Ismail (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

An Afghan protester shouts slogans near burning tyres during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

Afghan protesters shout slogans during a demonstration in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

An Afghan policeman points his rifle towards protesters in Kabul September 17, 2012. Thousands of protesters took to the streets of the Afghan capital on Monday, setting fire to cars and shouting "death to America", the latest in demonstrations that have swept the Muslim world against a film mocking the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

Afghan protesters try to tear a U.S. flag as they shout slogans during a demonstration in Kabul, September 16, 2012. Hundreds of Afghans protested against a U.S.-made film they say insults the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION CIVIL UNREST) 

Afghan protesters shout slogans during a demonstration in Kabul, September 16, 2012. Hundreds of Afghans protested against a U.S.-made film they say insults the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION CIVIL UNREST) 

Afghan protesters shout slogans during a demonstration in Kabul, September 16, 2012. Hundreds of Afghans protested against a U.S.-made film they say insults the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION CIVIL UNREST) 

Afghan protesters set fire to a U.S. flag as they shout slogans during a demonstration in Kabul, September 16, 2012. Hundreds of Afghans protested against a U.S.-made film they say insults the Prophet Mohammad. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: RELIGION CIVIL UNREST) 

Afghan protesters shout anti-U.S. slogans during a demonstration in Jalalabad province September 14, 2012. Hundreds of Afghans protested against a movie they say insults Prophet Mohammad. REUTERS/ Parwiz (AFGHANISTAN - Tags: RELIGION CIVIL UNREST POLITICS) 

Afghan protesters set fire to a U.S. flag as they shout anti-U.S. slogans during a demonstration in Jalalabad province September 14, 2012. Hundreds of Afghans protested against a movie they say insults Prophet Mohammad. REUTERS/ Parwiz (AFGHANISTAN - Tags: RELIGION POLITICS CIVIL UNREST) 

Afghan protesters set fire to an effigy of U.S. president Barack Obama, as they shout anti-U.S. slogans during a demonstration in Jalalabad province September 14, 2012. Hundreds of Afghans protested against a movie they say insults Prophet Mohammad. REUTERS/Parwiz (AFGHANISTAN - Tags: RELIGION POLITICS TPX IMAGES OF THE DAY CIVIL UNREST)