The military investigation into the deadly attack during the Afghanistan evacuation has concluded that a suicide bomber, carrying 20 pounds of explosives packed with ball bearings, acted alone, and that the deaths of more than 170 Afghans and 13 U.S. service members were not preventable.
The blast at Abbey Gate outside the Kabul airport on Aug. 26 killed 11 U.S. Marines, a sailor and a soldier, who were screening the thousands of Afghans frantically trying to get onto one of the crowded flights leaving the country after the Taliban takeover. The Islamic State group claimed responsibility for the attack.
