| Munich, Germany || 1972 || The [[Munich massacre]] at the Summer Olympics. || 12
| Munich, Germany || 1972 || The [[Munich massacre]] at the Summer Olympics. || 12
|-
|-
−
| New York City || September 11, 2001 || Four [[Al Qaeda]] terrorists, each piloting a passenger airliner, flew planes to their intended targets in the [[9/11 terrorist attacks]]. || 6000+
+
| New York City || September 11, 2001 || Four [[Al Qaeda]] terrorists, each piloting a passenger airliner, flew planes to their intended targets in the [[9/11 terrorist attacks]]. || 2,996
|-
|-
| Madrid, Spain || March 11, 2004 || The [[2004 Madrid Bombings]] were a series of commuter train attacks. || 191
| Madrid, Spain || March 11, 2004 || The [[2004 Madrid Bombings]] were a series of commuter train attacks. || 191