11.   The incident marks the third time in less than a week that police have investigated the death of a child possibly at the hand of a parent.

12.   The incident marked a turning point in relations between the United States and Cuba.

13.   But the latest incident marked the first time an abduction was carried out by Islamic militants.

14.   But the latest incident marked the first time an abduction was carried out by Islamic extremists.

15.   Moshe Shahal, the outgoing minister of internal security, said the incident marked the first time assailants carried out a drive-by shooting in Israel proper.

16.   That incident marked the first time an opposition rally turned violent in post-Soviet Kyrgyzstan.

17.   The friendly fire incident marked the worst U.S. casualties of the war to date.

18.   The incident marked the most serious confrontation between Israeli troops and Palestinians since pro-Iraq demonstrations began in the West Bank several weeks ago.

19.   The incident marked the most serious confrontation between Israeli troops and Palestinians since pro-Iraq demonstrations began on the West Bank several weeks ago.

20.   The incident marked the most serious outbreak of hostilities in the months since an August peace accord sought to end fighting between ethnic Albanian rebels and Macedonian government forces.