An Afghan policeman stands guard at the scene of a suicide bombing in Kabul Afghanistan, Saturday, 8, 2012. Afghan authorities say a suicide bomber has blown himself up near NATO headquarters in Kabul, killing at least 6 people (AP Photo/Ahmad Jamshid)

Photo by: Ahmad Jamshid

An Afghan policeman stands guard at the scene of a suicide bombing in Kabul Afghanistan, Saturday, 8, 2012. Afghan authorities say a suicide bomber has blown himself up near NATO headquarters in Kabul, killing at least 6 people (AP Photo/Ahmad Jamshid)