Blood stained the ground at the scene today in Khost, where a suicide bomber struck. Anwarullah /Reuters /Landov hide caption

toggle caption Anwarullah /Reuters /Landov

A suicide bomber struck a convoy of buses today in Kabul, killing at least 12 people — mostly foreigners. Massoud Hossaini /AFP/Getty Images hide caption

toggle caption Massoud Hossaini /AFP/Getty Images
Four U.S. Troops Killed In Afghanistan; NATO Strike Kills 8 Afghan Women
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