Complex sentence: On August 7,1998, at the age of 21, Sergeant Aliganga was killed by a car-bomb explosion, along with eleven fellow Americans, in the terrorist attack later determined to be conducted by Osama bin Laden and the Al Qaeda network.
Split into simpler sentences: On August 7,1998, at the age of 21, Sergeant Aliganga was killed by a car-bomb explosion, along with eleven fellow Americans, in the terrorist attack. The attack was later determined to be conducted by Osama bin Laden and the Al Qaeda network.